The Rhythm Changes Guide (Sher Music, 2020) Endorsements ​ Lukas has put together an amazing, much needed book on one of music's most universal forms. It is very clear and concise and can be used on several different levels. Whether you are a beginning or an advanced improviser, there are many things to be learned here. I plan on using it for my classes and lessons as well as for my own playing and practicing. Five stars and highly recommended!” — Rick Margitza ​  This is the most thorough and useful method on the subject of "rhythm" changes I have seen. I would recommend this book to everyone who wants to improve their ability to negotiate tunes based on "rhythm" changes; always a challenge to jazz musicians. The Rhythm Changes Guide will be a tremendous asset to anyone interested in this subject.” — Walt Weiskopf ​  The Rhythm Changes Guide by Lukas Gabric has everything you need to know about playing the time-honored song form.The author,a master musician,offers detailed insight into his harmonic concepts and gives everyone the chance to learn more about the art of jazz improvisation by sharing this deep knowledge of the subject matter. A must have!” — Thomas Gansch ​  Blues and rhythm changes are important milestones in jazz music. I personally know some research on playing the blues but not much on rhythm changes. This book by Lukas is a great study on this very important part of jazz. I warmly recommend it to everyone who wants to dive deeply into rhythm changes.” — Tony Lakatos ​  This book works well as a kind of encyclopedia of rhythm changes, and that's a valuable thing for serious, committed mainstream jazz improvisers (certainly including myself ) to have as a kind of reference work. It's well organized, and so thorough that even though I've spent a few hundred hours myself on rhythm changes, I can still find pathways that I haven't yet explored.” — Dan Greenblatt ​ ​