Link, please?
I didn’t know one could search out reviewers, members over at amazon, probably possible somehow.
But there is an author and a motivational speaker named Ivan S. Lopez, I doubt if this is the same person.
http://www.amazon.com/For-Kailee-Ivan-S-Lopez/dp/1448609976
It was the violent video gamer one. Lotza grunts use these to blow off steam. I imagine mental grunts use them, too.
Check out the Magpul stuff on Ivan A Lopez’s Amazon Wish List
http://www.amazon.com/gp/registry/wishlist/1WA0K228GAU7H/ref=cm_wl_search_bin_1_1