This book has been written to help improve improvising skills. It offers the opportunity to practice soloing with a band with a collection of solos written over a series of different chord changes. Each track on the CD has a short version to match the length of the transcribed version (without the solo) to improvise over. In this way you can study the solos and pick and choose the licks you prefer to help build your own solos. This is the Bb edition.