At our vacation house we had a book by Nancy Garden called 'Weerwolven en Vampiers', which was a Dutch translation of the combination of her books 'Vampires' and 'Werewolves'. It was more a matter of being impressed by it rather than being influenced, although when I started reading it the first time (around the age of 6 or 7 I think) I did find it quite startling and was influenced in that I disliked the dark even more after that. I wasn't allowed to read it, but that only made me want to read it more.
It's about the history of vampires and werewolves in worldwide folklore and culture (including some of the short stories), and scientific explanations of some of it. I still have the book at home, after almost 40 years, and reread it a few years ago.