The title really does say it all with this book!
I've been brewing for a few years now, and upon getting this book my beers have leapt forward from being usually OK (but still very obviously homebrewed), to being beers that I would be happy to receive in a pub or beer festival...honestly!
This book contains just about everything you could need for any stage in your brewing life. Everything from the beginner's standard 'can and kilo' brews, right up to full grain and everything in between.
Ingredients, methodology, techniques, equipment, recipes - its all here.
(My only slight criticism is that it is doesn't contain details on 'kegging' your beer, but this is really fairly simple and info can be easily found online for this if you wish.)
Basically this is the only beer homebrew book you will need - I highly recommend it!