Music Theory for Guitarists — Tom Kolb (Hal Leonard Guitar Method)

Music Theory for Guitarists: Everything You Ever Wanted to Know But Were Afraid to Ask (HL00695790) by Tom Kolb presents practical music theory for guitarists of all levels in plain language with diagrams. Part of the Hal Leonard Guitar Method series, it covers intervals, scales, modes, chords and ear training. The accompanying online audio provides 94 tracks of music examples, scales, modes, chords and ear-training exercises.