Piano by Ear: Learn to Play by Ear, Improvise, and Accompany Songs in Simple Steps (Faber Edition)

Piano Chords & Progressions:: The Secret Backdoor to Exciting Piano Playing!

How to Play Popular Piano in 10 Easy Lessons: The Fastest, Easiest Way to Learn to Play from Sheet Music or by Ear

How to Play the Piano Despite Years of Lessons: What Music Is and How to Make It at Home

How to Play from a Fake Book (Keyboard Edition)

The Chord Wheel: The Ultimate Tool for All Musicians

Piano & Keyboard Chords: Easy-to-Use, Easy-to-Carry, One Chord on Every Page

Scales, Chords, Arpeggios and Cadences: Complete Book

Chordwand Piano Chord Finder

Alfred's Teach Yourself Chords & Progressions at the Keyboard: Everything You Need to Know to Start Playing Now!, Book & CD (Teach Yourself Series)