A History of Christianity by Diarmaid MacCulloch
Bad Religion: How We Became a Nation of Heretics by Ross Douthat
Boxers & Saints by Gene Luen Yang
Byzantium by Stephan Lawhead
God Is Disappointed In You by Mark Russel
Jesus of Nazareth: From the Baptism in the Jordan to the Transfiguration by Pope Emeritus Benedict XVI
Orthodoxy by G.K. Chesterton
Pontius Pilate by Paul L. Maier
Silence by Shusaku Endo
Non-Christian Religions:
Going Clear: Scientology, Hollywood and the Prison of Belief (Scientology)
Not Peace But A Sword (Islam)
Historical Fiction (with religious themes):
The Flowers of War by Geling Yan