I try to spend a half hour with it every night. This book will appeal to a wide range of interests. Whether you are a composer interested in theory, or a keyboardist enhancing your chops, there is something here for you. Most examples are four-measures long, but rich in musicality (kind of like what the Bach chorales are for those studying classical music.) The examples progress from simple chord progressions to more complex, and each is one is clearly explained. Nice melodies too! It is apparent that the author has spent a lot of time with each of the sub-genres (swing, ballads, blues, Latin, etc.) and has distilled his knowledge into a neat recipe book that will serve as a launching point for those wishing to further their expertise.