"...I intend to make it required study material for my trombone students at USC. I recommend it to all serious instrumentalists”.
- Bill Watrous, Trombonist

“Keith’s book is a must for all levels of players for the development of chord and scale studies. He takes you logically through every kind of chord and scale that will work with it. If it isn’t in here, it doesn’t exist!
- Tom Kubis, Arranger/Composer

“Chord/Scale Mastery by Keith Felch is an excellent, well organized, concise method for mastering 10 common chord types and their scale sources, both common and uncommon. The exercises are practical for improvisation and utilize the full range of one’s instrument. The play-along CD has a wonderful rhythm section, and is well-recorded, allowing the user to really hear how the chord tones and scale sources sound (especially the chord extensions and uncommon scale sources). I highly recommend this publication and congratulate Mr. Felch on a job well done”.
- Gary Matsuura, Director of Jazz Studies, Chapman University

"Keith Felch's new book Chord/Scale Mastery is a must for any serious jazz student. It not only provides all the scales necessary for improvisation, but it does it in a very logical and user friendly way.  Way to go, Keith!"
- Ron Kobayashi, Pianist/Composer

"A very thorough yet fun approach to improvisation written by an educator with a true passion for teaching."
- Matt Lilley, Director of Music Clearance, Paramount Pictures