SHER Music & Chuck Sher 
Foundation Exercises For Bass [EPUB ebook] 

This book is designed to teach the fundamentals of bass playing to anyone, regardless of the style of music or level of the player. For electric or acoustic bass, it shows how to practice scales, arpeggios, rhythms, ear training, bass line construction, and more in a creative way that makes learning to play music fun! Endorsed by Marc Johnson, Larry Grenadier, Bobby Vega, Steve Swallow, etc.