381 A.D.: Heretics, Pagans and the Christian State
by Charles Freeman

The Popes of Avignon: A Century in Exile
by Edwin B. Mullins

The Great Medieval Heretics: Five Centuries of Religious Dissent
by Michael Frassetto

Ireland's Saint: The Essential Biography of St. Patrick
by J. B. Bury

Barbarians to Angels: The Dark Ages Reconsidered
by Peter S. Wells

The Dark Side of Christian History
by Helen Ellerbe

A History of God: The 4000-Year Quest of Judaism, Christianity and Islam
by Karen Armstrong

Evolving God: A Provocative View of the Origins of Religion
by Barbara King

Infidel
by Ayaan Hirsi Ali

The Death of Humanity: and the Case for Life
by Richard Weikart