This book is great for electric bassists who have learned the basics and are ready to take the next step. It takes you further into using scales to build bass lines, techniques such as slap and pop and string muting, and creating walking bass lines. It also explores ideas such as modes, tetrachords, pasing tones and varying rhythmic activity. A superb book which keeps things fun and interesting, but doesn't sacrifice any important details. An absolute must for any serious Bass player.