Tolong jelaskan mengenai Karya dari Robert Spencer

The Truth About Muhammad: Founder of the World's Most Intolerant Religion, Regnery Press, 2006 (NYT bestseller list – 2006-10-29) ISBN 1-59698-028-1

The Politically Incorrect Guide to Islam (And the Crusades), Regnery Press, 2005. (NYT bestseller list – 2005-10-16) ISBN 0-89526-013-1