Most of these books are available on Amazon. com and should be readily available in a decent-sized music store:

Mickey Baker, Mickey Baker's Jazz Guitar (Omnibus Press).

William Bay, Mike Christiansen, Mastering the Guitar: A Comprehensive Method for Today's Guitarist (Mel Bay Publications). This is a seven-book series.

Gene Bertonicini, Approaching the Guitar (Kjos Music Co.).

Mick Goodrich (Pat Metheny, contributor), The Advancing Guitarist (Hal Leonard).

Ted Greene, Modern Chord Progressions (Warner Bros.).

William G. Leavitt, Modern Method for the Guitar: Vols 1, 2, 3 (Hal Leonard).

John Mehegan, Jazz Rhythm and the Improvised Line Jazz Improvisation (Music Sales Corp).

John Mehegan, Tonal and Rhythmic Principles Jazz Improvisation (Music Sales Corp.). The Mehegan books are nominally for piano players, but if you can translate the material for the guitar, you will develop fantastic musical muscles.

Frederick Noad, Solo Guitar (Music Sales Corp.).

Aaron Shearer, Classical Guitar Technique (Warner Bros.).

Nicolas Slonimsky, Thesaurus of Scales and Musical Patterns (Music Sales Corp.). This was the book that John Coltrane studied extensively.

Tommy Tedesco, For Guitar Players Only (Dale Zdenek Publications). This book is out of print, but if you can find it, it's well worth buying. It will help you with your sight reading.