Yes, there are several important Jain scriptures and texts that define Jain dharma (Jain religion and its principles). Some of the most significant ones are:

1. Āgamas (Agamas):

These are canonical scriptures of Jainism, especially for the Śvētāmbara sect. They contain the teachings of Lord Mahavira and are considered the primary sources of Jain dharma.

1. Tattvartha Sutra (also called Tattvarthadhigama Sutra):

Written by Acharya Umaswati (Umasvami), this text is accepted by all Jain sects and systematically presents Jain philosophy and ethics. It is often called the “Jain Bible.”

1. Samayasara:

Composed by Acharya Kundakunda, this is a key text that explores the nature of the soul and the true essence of Jain dharma.

1. Pravachanasara:

Also by Acharya Kundakunda, this text explains the core teachings of Jainism.

1. Dashvaikalika Sutra, Uttaradhyayana Sutra, and Acharanga Sutra:

These are among the oldest Jain texts and lay down the rules of conduct and the path of liberation.

These texts, along with many commentaries and later works, define and elaborate on Jain dharma, including its core principles: Ahimsa (non-violence), Satya (truth), Asteya (non-stealing), Brahmacharya (celibacy/chastity), and Aparigraha (non-possessiveness).

If you are interested in an introductory book in English, you may consider:

• "The Jains" by Paul Dundas
• "Jainism: An Introduction" by Jeffery D. Long

These provide summaries and explanations of Jain dharma based on the scriptures and traditional teachings.