Biography Robert Spencer is the director of Jihad Watch and a Shillman Fellow at the David Horowitz Freedom Center. He is author of 21 books including many bestsellers, such as The Politically Incorrect Guide to Islam (and the Crusades), The Truth About Muhammad and The History of Jihad. His latest book is Did Muhammad Exist?: An Inquiry into Islam's Obscure Origins―Revised and Expanded Edition. Follow him on Twitter here. Like him on Facebook here.