el> Unless you're a total beginner, or want to study the 
 el> theoretical ramifications of the effects of various semitone
 el> frequencies  on the human psyche, it's best to stay away from books. I
 el> don't mean to  sound anti-intellectual, but IMHO you learn more, at
 el> least musically, by  watching and LISTENING to others play than
 el> analyzing imprints of ink on a binded mass of processed forest
 el> material. 
 el> ...But of course you can't learn watching or listening unless you 
 el> have that WILLINGNESS and NEED to learn!
 el> elson@westworld.com
 
 while i agree w/the spirit of what elson is saying, there is something to
 learning the basics of music theory.  it always helps to know how chords
 are constructed, and the nomenclature.  also, one can sometimes find 
 transcription books, which can help one study a how previous master has 
 "dealt" w/chord changes, etc.  admittedly, most of these books apply more
 toward straight-ahead jazz, but a background in one of the sources of a/j
 will only help your playing and confidence.  the most important thing though
 is to LISTEN.
 t-bird
... [to end a solo] you take the horn out of your mouth-miles davis