Check these books:

http://www.amazon.com/The-Algorithm-Design-Manual-ebook/dp/B...

http://www.amazon.com/Programming-Pearls-2nd-Jon-Bentley/dp/...

Prefer Python ?

http://www.amazon.com/Python-Algorithms-Mastering-Language-E...

http://www.amazon.com/Structures-Algorithms-Python-Michael-G...