Leonard Ashley has compiled a modestly informed, error-filled book with far more interest in his inflated ego than any true scholarship. The glaring errors are not nit-picking either...he boasts of his own prowess as a scholar, then makes major mistakes when referring to some of the most classic werewolf films ever made - including Universal's "The Wolf Man". The volume does succeed in bringing together a fairly wide array of entertaining werewolf & shape-shifter lore, but with all of the really good books on the history of lycanthropy that have been published over the years, there's no reason to subject yourself to Ashley's condescending remarks and insults directed at his readers. Mr. Ashley clearly feels that werewolves (and fans of werewolves as well) are beneath him - but I get the impression that he must have been under contract to write the book anyway.
People looking for a great resource on werewolf legends should pick up Brad Steiger's "The Werewolf Book".