First, here’s what this book is not: It’s not a textbook, nor a long-winded history, nor a rote learning tool. Lots of those kinds of books are on the market, if that’s what you’re looking for — but beware, they are often dry and assume underlying knowledge.
Guitar All-in-One For Dummies is a generous conglomeration of material from several For Dummies guitar and music books. It aims to cover the guitar gamut, from what those thingies are called that wind the strings (tuning machines) to how Stevie Ray Vaughan got his incredible sound (by tuning lower, among other tricks) to which chords just plain sound good together when writing songs (depends — see Chapter 4 in Book VII).
Much of the material is relevant to any style of guitar playing. But three popular guitar genres each get their own book: rock guitar, blues guitar, and classical guitar. You also find chapters on learning to read music, on building your chord repertoire, on amps, scales, songwriting . . . let’s just say there’s a lot here. And don’t forget the CD!