"Jainism is a world religion, technically in the category of Near Eastern religions, founded some six centuries before the birth of Christ. Along with Hinduism, Buddhism, and Sikhism, the Jain found their nexus in India, which colors much of their practices, doctrines, and followers. It is a nontheistic system that denies the need for a god, and focuses instead on the strict practices and devotion that lead to enlightenment." –The Popular Encyclopedia of Apologetics, p. 288.
"Jainism" entry in the Popular Encyclopedia of Apologetics
"Jainism" in The Encyclopedia Britannica
"Jainism: Its History, Beliefs and Texts" by the BBC (a good overview by non-Christian news org.)
"Respectfully Engaging Jainism" by Dallas Theological Seminary