Ka-Ching is a guitar guide taking the reader from the basics of sound and human hearing to complex chord progressions. It is only available as an e-book at $1.99 on Smashwords and Kindle. The others are $2.99 and also available on print on demand via email at pdemitchell@yahoo.com. I've had the pleasure of repaying the late Chris Thomas's kindness by editing and publishing his e-books:
