The Jazz Theory Book

Alfred's Basic Piano Prep Course Theory, Bk B: For the Young Beginner (Alfred's Basic Piano Library, Bk B)

Practical Theory: Complete, Spiral-Bound Book

Music Theory for Electronic Music Producers: The producer's guide to harmony, chord progressions, and song structure in the MIDI grid.

Music Theory for Guitarists Book/Online Audio (Hal Leonard Guitar Method) - Guitar Chord Book with 94 Tracks - Guitar Learning Book with Step-by-Step Lessons - Easy-to-Read Guitar Scales Book

Alfred's Basic Piano Library Theory, Bk 3 (Alfred's Basic Piano Library, Bk 3)

Alfred's Basic Piano Library All-in-One Course, Book 2

Alfred's Basic Piano Prep Course Lesson Book, Bk D: For the Young Beginner (Alfred's Basic Piano Library, Bk D)

The Circle of Fifths: visual tools for musicians

Alfred's Basic Adult All-in-One Course: Lesson, Theory, Technic (Alfred's Basic Adult Piano Course)