Yeah. I hate to say it, but in this situation, don't buy a book. Sheldon Brown and a little common sense will get you through it. I just started working on my bikes a few years ago and now I can do all of my maintenance. If it requires a tool that costs more than $50 (headset press), I just take it up the the LBS and have them do it for $5 or so.

If you have questions, feel free to ask here...and most importantly, have fun!