james jamerson was the sound of motown. he was a genius who crafted all the early motown songs besides bob babbit.
to get a clearer picture you have to buy the dvd s$49.90 or vcd S$9.90 titled -'standing in the shadows of motown' - it actually tells the motown story, the musicians involved and who are still alive today known as the funk brothers, i believe you them backing the american idol finalists last season (4) when the covered motown songs.
you might want to listen to -
'reach out i'll be there' - temptations
'ain't no mountain high enough' - the supremes
'for once in my life' - stevie wonder
these are on many motown compilations dist by universal music - if its your firt intro to jamerson get the compilation cds as he played on 92% of motown stuff.
once you've seen the movie then get the book with the same title.
i recommend you order it from amazon.com as it is now going for a mere US$22.00 thats US$10 off the list price. it also c/w 2 cds that you can play along with you bass guitar, pan to the left to cut out the bass line.