Chords

Resources for Chords under Fundamentals. Pair these picks with articles on themusictheoryprofessor.com.

Books & textbooks

Harmony and Voice Leading (Edward Aldwell & Carl Schachter)
Chord spelling and progression analysis.
The Chord Wheel (Jim Fleser)
Visual chord relationship reference for guitar and keyboard.
Chord Progressions for Songwriters (Richard Scott)
Popular chord loops and substitutions.
Piano Chord Dictionary (Hal Leonard)
Keyboard chord shapes quick reference.