What I'm reading: Enumerative Combinatorics, vol. 1 by Richard P. Stanley

This is definitely one of the books in combinatorics. I had a tough time getting started with this book as an undergraduate, but now that I'm a little more seasoned it's going smoothly. Probably the biggest lesson so far is how much algebra and calculus I've forgotten in the last decade! I'll try to post more as I get into the meat of this great text.