I would describe myself as an advanced jazz bass player. I have a good concept of be-bop playing (Paul Chambers, Ray Brown, ect.) however I am trying to move my playing to the next level and make my vocabulary a little more "hip" (Dave Holland, Ron Carter, ect.). I am looking for a book that will help me modernize my playing. I've been thinking about getting Concepts for Bass Soloing but I have ordered John Goldsby's new book. Will John Goldsby's book be sufficiant or should I also order the Sher and Johnson book? Or should I look elswhere for material to help take me in the direction that I want to go? Thanks for any help.