I am a sophomore History major with a concentration in comparative religion and my capstone is going to be about the Crusades. Problem is, although my school has an amazing professional team, the only professor who concentrated on the Crusades moved to Germany. I need help finding books to use to get information on my topic and eventually build a thesis out of. Preferably books in English, but those in Arabic are also acceptable.

There are no classes on the Crusades, because the teacher moved, and the only other teacher I had that brushed upon the topic just retired. I have no time period preference, or country preference. Just a whole mess of information to familiarize myself more with the topic would be fabulous.

A list of Authors or well-rounded books would be great! Thanks!