The review book I recommend for the AP Microeconomics test is McGraw-Hill's 5 Steps to a 5 AP Microeconomics/ Macroeconomics written by Eric Dodge
ISBN 0-07-143712-6
The book can be found online at:
www.Booksamillion.com ($12.23)
www.BarnesandNoble.com ($13. 72)
www.shop.com ($9.50-17.00)
www.amazon.com ($11.53)