Advice:
1. Don't play without bonuses.
2. Research the casino/bonus before you play (the T&Cs, banking methods, rep & payment history, the software etc).

Casinomeister gives some good sites and advises you where not to play. One forum I'm a regular at is Bet2gamble.com . Not a greenchip member at BJ21.com, but it's another good place to meet players who go for bonuses.

You don't need any books, it's very easy. Just do your research and you'll be fine (I spend more time on research and forums than actually playing).