This book with online audio by noted arranger and composer Steve Rawlins is both a warm-up collection and a manual for bebop phrasing. Its tasty and sophisticated exercises are designed for both vocalists and instrumentalistsinterested in further developing their proficiency with jazz interpretation. It concentrates on practice in all twelve keys - moving higher by half-step - to help develop dexterity and range. The audio tracks, available online fordownload or streaming, include all of the exercises in 12 keys.