I recommend this book as well. I'm about halfway through it for a class I'm taking and its pretty good. I've pasted the table of contents below:
1. Defining Terrorism
2. The End of Empire and the Origins of Contemporary Terrorism
3. The Internationalization of Terrorism
4. Religion and Terrorism
5. Suicide Terrorism
6. The Old Media, Terrorism, and Public Opinion
7. The New Media, Terrorism, and the Shaping of Global Opinion
8. The Modern Terrorist Mind-set: Tactics, Targets, Tradecraft,
and Technologies
9. Terrorism Today and Tomorrow
Bookmarks