Background:
Lord Mahavir's preaching was orally compiled into many texts (Sutras) by his disciples. Collectively these texts are called Jain canonical or Agam literature. 

The Agam Sutras show great reverence for all forms of life and strict codes of vegetarianism, asceticism, nonviolence, and opposition to war. 

Traditionally these sutras were orally pass on from teachers (acharyas or gurus) to the disciples for several centuries. Also, during the course of time many learned acharyas (elder monks) compiled commentaries on the various subjects of the Agam literature. In olden times, the books were hand written and rare. 

Also the religious books and scriptures were considered possessions and attachments for ascetics. Therefore Agam sutras were rarely documented and not widely distributed for or by ascetics.

During the course of time, it became extremely difficult to keep memorizing the entire Jain literature (Agam sutras and Commentary literature) compiled by the many scholars. Also there occurred a twelve years of famine around 350 BC. It was extremely difficult for the Jain ascetics to survive during this time.

Under such circumstances they could not preserve the entire canonical literature. In fact, a significant number of Agam sutras were already forgotten and lost after the famine.

Later, when the Jain congregation relaxed the vow of non possession with regards to religious scriptures for ascetics, they had already forgotten much of the oldest canonical literature such as twelfth Ang-agam known as Drastiwad, which included fourteen Purvas. The rest of agams were polluted with some modifications and errors.

The Digambar Jain sect maintained that after the famine, the entire Jain canonical literature (Agam Sutras) became extinct. However the Swetambar sect believed that only fourteen Purvas were forgotten but the significant portion of the remaining Agam Sutras were remembered by their ascetics and hence they documented the Agam Sutras (canonical literature) as remembered by them at various time. 

Jain history indicates that during the course of time, Swetambar ascetics held three conferences for the preservation of the Jain canonical, commentaries on cannonical, and noncanonical literature. The documentation occurred during second and third conferences.

Name of City Time
1. Patli-putra @320 B.C.
2. Mathura and Valabhi @380 A.D.
3. Valabhi @520 A.D.

Around 1400 to 1600 AD, the Swetambar sect also divided into three subsects known as Swetambar Murtipujak, Sthanakvasi, and Terapanthi. Differences also exist among all three Swetambar Jain sects in their acceptance of the validity and interpretations of the documented Jain scriptures (Agam Sutras) and other literature.

Jain Literature
Jain literature is classified into two major categories:

Agam or Canonical Literature (Agam Sutras)
Agam literature consists of many texts, which are the sacred books of the Jain religion. They are written in the Ardha-magadhi Prakrit language. 

Non agam Literature 
Non-agam literature consists of commentary and explanation of Agam literature, and independent works, compiled by ascetics and scholars. They are written in many languages such as Prakrit, Sanskrit, Apabhramsa, Old Marathi, Rajasthani, Gujarati, Hindi, Kannad, Tamil, German, and English.

Agam Literature:
Lord Mahavir's preaching was methodically compiled by his immediate disciples known as Gandharas, and elder monks known as Srut-kevalis into many texts known as Sutras. These Sutras are collectively known as Agams or Agam Sutras, the sacred books of the Jain  religion. Hence, the Jain religion does not have one sacred book like the Bible or Koran, but it has many books compiled by several Gandharas and Srut-kevalis during 150 years after Lord Mahavir's nirvan (death). 

Agam literature is also divided into two groups:
Ang agams or Ang pravista agams
Ang bahya agams (outside of Ang agams)

Ang agams or Ang pravista agams:
Lord Mahavir's immediate disciples were known as Ganadharas. All Ganadharas possessed perfect knowledge (keval jnan) and attained liberation at the end of their human life. They orally compiled the direct preaching of Lord Mahavir into twelve main texts (sutras). These texts are known as Ang agams. Hence the Ang agams are the oldest religious scriptures and the backbone of Jain literature.

Present Status of Ang-agams: Total Number of Number of Jain Sects 
Ang agams Ang agams Ang agams 

The twelfth Ang agam is called Drastivad. The Drastivad consists of fourteen Purva texts, also known as Purvas or Purva agams. Among Ang agams, Purvas were the oldest sacred texts. All Jain sects believe that knowledge of the Purvas (Drastivad) was gradually lost starting about one hundred fifty years after Lord Mahavir's nirvan (death). However, other Jain scriptures and literature reference the subject matter of the Purvas.

The Digambar Jain sect also believes that the other remaining eleven Ang agams were gradually lost. All Swetambar Jains believe that the eleven Ang agams were remembered by their ascetics and were properly documented by them during the last two conferences that were held in Mathura and Valabhi around one thousand years after Lord Mahavir's nirvan.

Ang bahya agams (outside of Ang agams):
Monks who had knowledge of a minimum of ten Purvas were known as Srut kevlis. They possessed the total knowledge of reality (soul, matter, their relationship etc.) through scriptures. The Srut kevlis wrote many texts (sutras) expanding the subject matter of the Ang agams. Collectively these texts are called Ang bahya agams meaning outside of Ang-agams. The different Jain sects accept different numbers of Ang bahya texts.

Present Status of Ang-bahya-agams;
Number of Number of Number of Ang bhya agams Ang bhya agams Ang bhya agams

The Digambar sect believes that all Ang-bahya-agams were also gradually lost starting about two hundred years after Lord Mahavir's Nirvan. Hence in its opinion, the complete Jain agam literature is lost within few hundred years after Lord Mahavir's nirvan.

Classification of Ang bahya agams: 
The Swetambar sect has divided Ang bahya agams into the following categories:

Upang-sutras or Upang-agams:
The scriptures, which provide further explanation of Ang-agams, are called Upang-agams.

Chhed sutras or Chhed-agams:
The subject matters described in Chhed sutras are only for ascetics not for lay people. They relate to the conduct and behavior of monks and nuns. They also explain how they can repent for their sins and mistakes.

Mool sutras:
The scriptures, which are essential for ascetics to study in the earlier stages of their monkhood, are called Mool sutras. 

Chulika sutras:
The scriptures, which further enhance or decorate the meaning of Ang agams are known as Chulika sutras.

Prakirna sutras:The scriptures, which describe independent or miscellaneous subjects of the Jain religion, are known as Prakirna sutras. 

Following is the list of number of Ang-bahya-agams recognized as authentic scriptures by different Jain Swetambar Sects:

Swetambar Sthanakvasi and

Digambar Literature:
The Digambar sect believes that there were 26 Agam sutras (12 Ang agams + 14 Ang bahya agams). However, they were gradually lost starting from one hundred fifty years after Lord Mahavir's nirvana. Hence, they do not recognize the existing Agam-sutras (which are recognized by the Swetambar sects) as their authentic scriptures.

In the absence of authentic scriptures, Digambars use two main texts, three commentaries on main texts, and four Anuyogs consisting of more than 20 texts as the basis for their religious philosophy and practices. These scriptures were written by great Acharyas (scholars) from 100 to 1000 AD. They have used the original Agam Sutras as the basis for their work. 

Digambar Main Texts: 
Shatkhand agam or Maha kammapayadi pahuda or Maha karma prabhrut By Acharya Pushapdant and Bhutabali 160 AD
Kashay pahud or Kashay Prabhrut By Acharya Gunadhara

Commentary Texts:
Dhaval-tika:
Commentary on Shatkhand-agam Vol 1 to 5 Virsen
Maha-dhaval-tika:
Commentary on Shatkhand-agam Vol 6 Virsen
Jaya-dhaval-tika:
Commentary on Kashay-pahud Virsen and Jinsen

Four Anuyogas:
Pratham anuyoga or Dharma kath anuyoga - Religious Stories
Charn anuyoga - Conduct
Karan anuyoga or Ganit anuyoga - Mathematics
Dravy anuyoga - Philosophy

Shatkhand agam:
The Shatkhand agam is also known as Maha kammapayadi pahuda or Maha karma prabhrut. Two Acharyas; Pushpadant and Bhutabali around 160 AD wrote it. The second Purva agam named Agraya niya was used as the basis for this text. The text contains six volumes. Acharya Virsen wrote two commentary texts, known as Dhaval tika on the first five volumes and Maha dhaval tika on the sixth volume of this scripture, around 780 AD.

Kashay pahud or Kashay-prabhrut: 

Acharya Gunadhara wrote the Kasay-pahud. The fifth Purva agam named Jnan pravad was used as a basis for this scripture. Acharya Virsen and his disciple, Jinsen, wrote a commentary text known as Jaya dhaval tika around 780 AD. 

Four Anuyogas:
1. Pratham anuyoga (Dharma kath anuyoga) - Religious Stories
This anuyoga consists of the following texts, which contain religious stories, art, literature, history, poetry, and like literature.

2. Charn anuyoga - Conduct
This anuyoga consists of the following texts, which contain principles of observances, conduct, behavior, and like literature. 

Ratna karanda shravak achar Samantabhadra 600 A.D.

3. Karan anuyoga (Ganit anuyog) - Mathematics

This anuyoga expounded the texts, which had mathematical viewpoints. It consists of the following texts, which contain geography, mathematics, astronomy, astrology, and like literature.

4. Dravy anuyog - Philosophy
This anuyoga consists of the following texts, which contain philosophical doctrine, theories, metaphysics, Tattvajnan, and like literature.

Summary:

The Jain literature, which was compiled by Ganadharas and Srut-kevlis, is known as Agam literature. These texts are the Holy Scriptures of the Jain religion.

The Agam Sutras show great reverence for all forms of life and strict codes of vegetarianism, asceticism, nonviolence, and opposition to war.

The existing Agam Sutras are accepted as the authentic preaching of Lord Mahavir by the Swetambar sects, but the Digambar sect does not accept them as authentic.

Digambars follow two main text and four Anuyogs written by great Acharyas (scholars) from 100 to 1000 AD as the basis for their religious philosophy and practices The Jain literature, which is not classified as Agam Sutras, is known as non agam literature.

Appendix - Summary of Swetambar Jain Agams:
Ang agams:Ang-agams are the oldest religious scriptures and the backbone of Jain literature.

1. Acharang Sutra (Aayarang): This agam describes the conduct and behavior of ascetic life. It also describes the penance of Lord Mahavir. This is the oldest agam from a linguistic point of view.

2. Sutrakratang Sutra (Suyagdang): This agam describes nonviolence, Jain metaphysics, and the refutation of other religious theories such as Kriyavada, Akriyavada, Ajnanavada, and Vinayavada.

3. Sthananga Sutra (Thanang):This agam defines and catalogues the main substances of the Jain metaphysics. 

4. Samavayanga Sutra: This agam defines and catalogues the main substances of the Jain religion from a different perspective than the Sthananga Sutra.

5. Vhakhya Prajnapti or Bhagavati Sutra (Viyah Pannati): This agam explains the subtle knowledge of soul, matter, and other related subjects. Thirty-six thousands (36000) questions and answers are presented in discussion form. It is the largest of the eleven Ang agams.

6. Jnata Dharma Kathanga Sutra (Nayadhammakahao): This agam explains Jain principles through examples and stories. This text is very useful in understanding the mode of Lord Mahavir's religious preaching.

7. Upasaka Dashanga Sutra (Uvasagdasao): This agam explains the code of conduct of the ten lay followers (Shravaks) of Lord Mahavir. This agam is very useful for understanding the code and conduct of ordinary people (Shravaka Dharma) in the Jain religion.

8. Antah Kradashanga Sutra (Anatagaddasao): This agam tells the stories of ten sacred monks attaining liberation (Moksha) by destroying their karmas.

9. Anuttaroupa Patika Dashanga Sutra (Anuttarov Vaiya Dasao):This agam contains the stories of additional ten sacred monks who attained the top-most heaven, known as Anuttara heaven. 

10. Prashna Vyakrana Sutra (Panha Vagarnai):This agam describes the five great vows (mahavratas) and the five worst sins defined in the Jain religion.

11. Vipaka Sutra (Vivagsuyam): This agam explains the results of good and bad karmas through several stories. 

12. Drastivada Sutra: The twelfth Ang-agam Drastivad is considered lost by all Jain Sects. The description, which is found in the other Jain Sutras relating to Drashtivada, indicates that this Ang-agam was the largest of all Agam Sutras. It was classified in five parts; (l) Parikarma (2) Sutra (3) Purvagata (4) Pratham-anuyoga and (5) Chulika.

The third part, Purvagata contained 14 purvas. They contain the Jain religion's endless treasure of knowledge on every subject. Some scholars believe that it was so named, the knowledge, which existed before Lord Mahavira was called 'Purva'.

Upang-agams:

The scriptures, which were created in relation to Ang-agams, are called Upang-agams. They provide further explanation of Ang-agams.

1. Aupa Patika Sutra (Ovavaiya): This agam describes the splendid procession (view) of King Konika when he visited Lord Mahavir. It also explains how a person can attain heaven in the next life.

2. Raja Prashniya Sutra (Raya Pasen Ijja): This agam describes the story of Monk Keshi. Monk Keshi was the Ganadhara of Lord Parshvanath. He removed the doubts of King Pradeshi regarding the existence and attributes of the soul. Monk Keshi made the king a follower of the Jain religion. After his death, the king was born in heaven as a deva. He appeared from heaven to shower Lord Mahavir with unprecedented pomp and splendor. The thirty two dramas (plays) described in this agam throw light upon the ancient dramatic art of India.

3. Jivabhigama Sutra: This agam describes the universe and the subtle description of all living beings (souls) of the universe. It gives very important information to the scholars of biology and botany.

4. Prajnapana Sutra (Pannavana): This agam describes the form and attributes of souls from a different perspective.

5. Surya Prajnapti Sutra (Surya Pannti): This agam describes the Sun, the planets and the associated mathematics regarding their motion.

6. Chandra Prajnapti Sutra: This agam describes the Moon, the planets and the associated, mathematics regarding their motion. Both of these upangas, the Chandra Prajnapti and Surya Prajnapati, are very important in understanding the astrology of olden times.

7. Jambudveepa Prajnapti Sutra: This agam provides a description of Jambudveepa. Jambudeepa is a big island located in the center of the middle world as explained in the Jain geography. It also provides information on ancient kings. 

8. Nirayarvali Sutra: This agam describes the story of ten bother princes. All ten princes fought with King Chetaka of Vaishali in cooperation with king Konika. King Chetaka was the half brother of the ten princes. In the end all ten princes went to hell after dying in war.

9. Kalpa Vatansika Sutra (Kappavadamsiao): This agam describes the story of King Konika's children. They did not fight with King Chetaka in the war. They renounced the world and became monks. After their death, they went to heaven.

10. Pushpika Sutra (Puspiao): This agam describes the previous lives of certain devas (angels) who worshiped Lord Mahavir.

11. Pushpa Chulika Sutra: This agam describes stories similar to those in the Pushpika.

12. Vrashnidasha Sutra (Vanhidasao): This agam explains how Lord Neminath convinced ten kings in the Vrashni region to follow the Jain religion.

Chhed Sutra Aagams:
The subject matter described in the Chhed sutras is for ascetics and not for lay people. It provides the rule of conduct, punishment, and repentance for ascetics. It also explains how they can repent for their sins and mistakes.

1. Nisheetha Sutra (Nisiha): This agam explains the procedure of repentance (Prayashchitta) in the form of punishment for the monks and nuns who have violated the rules of ascetics.

2. Vrahat Kalpa Sutra: This agam explains which of the ten kinds of repentance (Prayashchittas) is appropriate for a particular wrongdoing done by monks and nuns. It also defines the acceptable conduct of monks and nuns.

3. Vyavahara Sutra: * This agam describes the system of confession for monks and nuns who fall from proper conduct. It explains the qualifications of the listening monk or nun and with what sort of feeling the confession should be made. It also explains what sort of repentance (Prayashchitta) the monk should perform. There are several other indications of the limits of ascetic life. 

4. Dasha Shruta Skandha Sutra (Achardasha): There are ten chapters in this Sutra. It contains the following information: 

Chapter Subject
1 20 places of Asamadhi
2 21 major faults bringing weakness in conduct
3 33 Ashatanas of Guru
4 8 Sampadas of Acharyas and their kinds
5 10 places of Chitta Samadhi
6 11 Pratimas of layperson
7 Pratimas of ascetics (monks and nuns)
8 KALPASUTRA (recited during the Paryushanas)
9 30 places of bondage of Mohniya karma
10 9 Nida nas (Niyane)

5. Panch Kalpa Sutra: *This sutra explains the daily rituals the monks and nuns have to perform. Only scattered chapters of this agam are now available. However, the commentaries (Bhashya and Churni) written about this agam by some elder monks are available.

6. Mahanisheetha Sutra: This agam explains the process of confession and repentance (Prayashchitta) for monks and nuns. It explains the magnitude of pain one has to suffer if he or she breaks the fourth vow (chastity). It also describes and explains the conduct of good and bad monks.

Mool-sutras: The scriptures, which are essential for monks and nuns to study in the early stages of their ascetic life, are called Mool sutras.

1. Avashyaka Sutra: The daily rituals or routines, which it is necessary to perform during the day and night for the purification of soul, are called Avashyaka. A description of the six routines (Avashyakas) is explained in this agam. The six routines are; Samayika, Chaturvinshatistava, Vandanaka, Pratikramana, Kayotsarga, and Pratyakhyana.

2. Dasha Vaikalika Sutra: This agam briefly describes and explains the conduct of ascetic life.

3. Uttaradhyayana Sutra: This agam has the same place in Jain literature as the Dhammapada in Buddhism and the Geeta in the Hindu religion. It contains preaching regarding religious principles and practices, and many stories, dialogues, and examples based on such principles and practices.

4. Ogha Niryukti or Pinda Niryukti Sutra: * This agam explains certain rules and procedures for monks with respect to travelling, staying, and accepting food and other necessities from lay people. 

Chulika sutras:
The scriptures, which enhance or decorate the meaning of Ang agams are known as Chulika sutras or some times known as Sutras. 
1. Nandi Sutra: This agam contains an elaborate description of Tirthankaras, Ganadharas, and five types of Knowledge (Jnan); Mati, Shrut, Avadhi, Manaparyay, and Keval-Jnan.
2. Anuyogadvara Sutra: This agam provides the description of many rights regarding the mode of preaching.

Prakirna agams:
The scriptures, which describe independent or miscellaneous subjects of the Jain religion, are known as Prakirna sutra.

1. Chatuh Sharana: *This agam contains prayers to the four benevolent beings:

Arihant God in the form of perfect human being Siddha God in the form of pure consciousness Sadhu - Ascetics Dharma Religion

2. Aatur Pratyakhyana (Aayur Pachakhana): * This agam explains differences in the death of children, youths, adults, and old people. It also describes the types of vows a wise person should take during various states of illness and how he should beg the pardon of all living beings in the universe.

3. Bhakti Parijna (Bhatta parinna): * This agam describes the process of fasting and how one should reflect at the time of death.

4. Sanstaraka (Santhara): * This agam describes the process of dying by one's own desire and its glory. 

5. Tandulavaitalika: * This agam describes the state of pregnancy and provides knowledge about the human body.

6. Chandra Vedhyaka: * This agam describes the method of concentrated meditation (Dhyana) that one should observe through the description of Radhavedha.

7. Devendra Stava: * This agam describes the names, positions, and residences of Devas (angels) that live in heaven. It also provides a description of the moon, sun, planets, and stars.

8. Ganita Vidya: * This agam describes palmistry and how it is used to predict the future (Nimitta).

9. Mahapratyakhyana: * This agam explains how to completely give up the worst sins and how to repent these sins.

10. Veerastava: * This agam is considered lost. However, it appears from literature referencing this agam that it contained prayers of Lord Mahavir.

Note: * These 13 Agams are not recognized by the Sthanakvasi and Terapanthi Jain sects.