The Book of Thomas the Doubter : Booklocker.com : 9781634900973 : 1634900979 : 01 Feb 2015 : THE BOOK OF THOMAS THE DOUBTER: Uncovering the Secret Teachings is a biblical, historical novel based on the Gospel of Thomas and Acts of Thomas uncovered among the ancient Nag Hammadi texts. The book depicts Thomas carrying out Jesus' secret teachings as a disciple and as an apostle in India. In India, there are sites and landmarks commemorating Thomas. Also in India are the Thomas Christians (the Syrian Nasrani), affirming their founder as the disciple Thomas.