I'll second Intro to Algorithms, which has been mentioned. It's what I used in my algorithms class and it's quite comprehensive. (It will also take you a while

I'll second Intro to Algorithms, which has been mentioned. It's what I used in my algorithms class and it's quite comprehensive. (It will also take you a while to get through.) I've also heard The Algorithm Design Manual recommended, although I haven't read it and don't own a copy. http://www.amazon.com/Algorithm-Design-Manual-Steven-Skiena/dp/1848000693/ref=tmm_hrd_title_0 http://www.amazon.com/Algorithm-Design-Manual-Steven-Skiena/...