Introduction to Reverse Engineering Software

If this interests you and you want to go forward, I'd personally suggest the book Reversing by Eldad Eilam over any other resource. However, I don't think books are the right way to go about it. I'd strongly recommend writing some simple C apps and compiling them to assembly (gcc -S) and just reading it back. You'll quickly learn your way around your ISA of choice (x86 for most of you, I'd imagine) and see how code compiles down. Once you get your feet wet, have a friend write up some code and compile it for you to decompile by hand.

This was how I learned RCE and I really can't recommend it highly enough. It's a bit steep at first, but you'll quickly get your bearings and be able to do real work.