This is Ken's 4th book, and in it he discusses a variety of strange creatures, many of which he has personally searched for.
Throughout A Menagerie of Mysterious Beasts, Ken discusses accounts of sea serpents and lake monsters, thunderbirds, living pterosaurs, werewolves, the Beast of Gevaudan, the Minnesota Iceman, Bigfoot and other man-like cryptids, Black Eyed Children, mermaids, giant toads and frogs, and much, much more.
This is an excellent book. The author covers quite a few cases that I'd never heard before and many cryptids I hadn't heard of either.
If you are someone (like me) who liked Ken's previous books, you'll definitely enjoy this one.