Robert, It occurs to me you might find Jamey Aebersold's free downloadable Jazz Handbook (www.jazzbooks.com) useful. I have a free "real book" of the chords to 300+ songs (Portable Changes) on the Resources page of my jazz guitar site: http://home.wanadoo.nl/keith.freeman/ Where songs are commonly played in more than one key I've included the different versions. Best of luck, - -Keith