Hi Don!
Just a couple of days ago I finished Jerry & Esther's second book "Deliberate Intent". I have to say that I preferred "Ask & It Is Given". I really thought book #2 took some basic concepts from book 1 and gave them a bit of a new twist.
I'd suggest that you at least START with "Ask"...then move on if you like.
A great book source (in case you don't know) is
http://www.zooba.com
All books are $10 and shipping is free.
Cheers!