[MalcolmDiggs]

In no particular order, I'd recommend reading:

* Introduction to Algorithms, by Cormen et al (aka "CLRS")

* Any of Robert Sedgewick's books on Algorithms ("Algorithms is C++", "Algorithms in Java", etc)

* The Art of Computer Programming by Knuth.

* If you want a more math-focused approach, Knuth has another book called "Concrete Mathematics" which might be worth your time.

* If you want something fun and accessible check out "9 Algorithms that Changed the Future" by MacCormick