I just posted the about the mel bay book
But I did find another book that a friend of mine wrote about the Eletrcic Bass, I did buy a copy from him, and it is pretty good, and I do find it is not a complecated to understand, nor do you have have a PHD to understand the concepts.
The Book is called " Playing the Electric Bass Guitar" by Bob Poriun
do check it out for yourselves at his site
CDs and Books - Bob Piorun
I have actually started to use it a coule iof weeks ago, myself, and even though I hav a lot of music training, this method is really good in explaining how to play electric bass in everyday language.