EWOLD is the best book out there on lucid dreaming. It covers Laberge's history with lucid dreaming and the methods he used to prove lucid dreaming's existence. He talks a little about dreams in general, then introduces the standard lucid induction techniques that he pioneered. MILD, WILD, WBTB, dream signs, and reality checks. There are some good relaxation and meditation/visualization excercises in the WILD section. His description of MILD and how prospective memory works is really good.

Most of the information in the book can be found on this website. I doubt you will find anything really "new" in there. His explanations of everything are very helpful and clear. I still read through it regularly, and give copies to friends and family. It is also good to hear it straight from the source, since he pretty much invented this stuff.