Flesh Eating Equines?

Came across this book listed on Amazon.com: Deadly Equines: The Shocking True Story of Meat-Eating and Murderous Horses .

Haven't read the book, don't anything about the premise. Here's some from the blurb:

There is widespread belief in a warm and comforting story which states the horse is a gentle herbivore. What if a Rosetta Stone had been found to unlock the dark secrets of the horse's past? An international multi-million dollar industry serviced by horse whisperers, glossy magazines and popular culture preaches that horses are meek prey animals who fear predators. What if evidence demonstrated horses have slain lions, tigers, pumas, wolves, hyenas and humans? Contemporary writers have successfully airbrushed murderous and meat-eating horses out of literature. What if Shakespeare, Sherlock Holmes and Steve McQueen provided artistic evidence to refute that claim? Thanks to global equestrian amnesia, the crucial role played by horses in recent history has been lost to mankind. What if testimony revealed meat-eating horses had been used to explore the Poles and photographs had been discovered of Tibet's blood-eating horses? Deadly Equines is a revolutionary departure from equestrian romance. It is a fact-filled analysis which reveals how humanity has known about meat-eating horses for at least four thousand years, during which time horses have consumed nearly two dozen different types of protein, including human flesh, and that these episodes have occurred on every continent, including Antarctica.

I don't know much about horses -- I'm not a horse person and while I think they're beautiful animals and I wish them no harm in any way, I admit I'm afraid of them. The book seems almost like a put-on. Yet a brief bit of searching does reveal some interesting things about meat eating horses. Like here. But mostly, searching revealed more links to places that insist horses do not eat meat, or sites discussing the ethical and health pros and cons of humans eating horse meat.