Tolong jelaskan mengenai Buku lain dari Robert Spencer

Did Muhammad Exist?: An Inquiry Into Islam's Obscure Origins, ISI Books, March 2012. ISBN 978-1-61017-061-1

Religion of Peace?: Why Christianity Is and Islam Isn't, Regnery Publishing, 2007, ISBN 1-59698-515-1

The Myth of Islamic Tolerance: How Islamic Law Treats Non-Muslims (editor), Prometheus Books, 2005. ISBN 1-59102-249-5

Onward Muslim Soldiers: How Jihad Still Threatens America and the West, Regnery Publishing, 2003. ISBN 0-89526-100-6

Islam: What the West Needs to Know