been playing bass for 18 years, thought I had my stuff down. Then I bought "Power Tools for five string bass" by mel bay with audio cd. Whew! Only practiced with it for 1/2 hour and already my hands are stretched sore! But there is plenty of helpful things to learn in notation ( I can't read), tab, and fretboard design (which is the easiest to navigate). I highly recommend it for beginners through advanced !