Myself and most of the other students at TCOM used "Osteopathic Manipulative Medicine Review for the Boards" by Steven L. Simmons, DO.
He was a graduate of TCOM who is currently a PM&R fellow at the county hospital here in Ft. Worth.
Most of us (and several from OK) also attended his review course. Very high yield, overall.
Don't know anything about the other book, but Dr. Simmons' can be found at amazon.com or directly from his website. Google it and you should find it (trying to avoid getting banned for promoting another website...🙂
After looking at his website, it looks as though the book is sold at most osteopathic schools' book stores.
Best of luck in whatever you choose...
jd