Discover circular chord progressions with Roger Boykin’s book, Cyclosis: A Treatises on Circular Composition and Improvisation. This guide breaks down complex writing techniques into easy-to-grasp concepts that will have your music flowing seamlessly. Perfect for musicians and composers ready to add a fresh twist to their songwriting. Roger’s approach makes crafting hypnotic, looping harmonies. Inspired by the work of John Coltrane, this book goes beyond Trane’s use of tonic movement in major thirds as heard in Giant Steps, Countdown and other tunes. Cyclosis shows that there are four other tonic movements that can be used in compositions such as minor thirds, whole steps, tritones, and half-steps. Examples are shown in original material by the author.