Instant Scale and Chord Guide for Keyboards by Gary Meisner (1990, Paperback)

I'm a self-taught keyboardist and for anyone who has ever thought of picking up the piano or keyboard, owes it to themselves to at the very least have a good reference for learning chords. Ive actually owned several copies of this book as I tend to reference it constantly and it is beyond helpful. Everything is laid out in very simple terms and is extremely easy to follow. For the price of a cheap lunch, this book is an absolute godsend. I cant say enough about it. Highly recommended!