Does anybody have any experience and feedback on these ACT books?

Test Preparation
1

Richard F. Corn’s Ultimate Guide to the Math ACT

http://www.amazon.com/Ultimate-Guide-Math-Richard-Corn/dp/1936214601

Mike Barrett’s ACT Prep Black Book

http://www.amazon.com/gp/aw/d/0692027912/ref=pd_aw_sim_14_1?ie=UTF8&dpID=51Isk20FNUL&dpSrc=sims&preST=AC_UL200_SR200%2C200&refRID=0894EZ8SXV8GQ373RJ45