The first is at Horror News, which you can find at this link. About the book, HN say in part: "Bestselling author Nick Redfern’s many books are always amazing and dependably controversial. His latest is Monster Files...an exposé that rips open hidden government files filled with evidence of strange animals whose existence has not been proven (until now)."
And then there's a review at Blog Critics. It notes: "Monster Files: A Look Inside Government Secrets and Classified Documents On Bizarre Creatures and Extraordinary Animals by Nick Redfern is an interesting story about a collection of fantastic sightings of bizarre creatures over the centuries. Redfern includes full length pictures of half-apes, the lagoon creature, Bigfoot, the Loch Ness Monster, winged beasts and creatures appearing to be real werewolves."
And here's an extract from a third review, at the Occult Detective site: "With his trademark attention to detail and fervent zeal for Fortean journalism, Redfern delivers another stellar addition to the annals of the Weird. Monster Files is an excellent primer for budding cryptozoologists and conspiracy buffs as it delves not only into a myriad of fantastic, legendary beasties and grumpkins, but also into the various government agencies who just might be more knowledgeable about such things than they’re willing to let on."