http://www.chordpiano-workshop.com
This is a excerpt of lesson 16 from the Chordpiano-Workshop.
With this book you can learn to play piano by ear with piano chords.
More free piano lessons you can get here:
http://www.chordpiano-workshop.com
OR
You can buy the book here:
http://www.chordpiano-workshop.com/node/61