I’ve read many “comprehensive’ books on faeries and most cover the usual English/Welsh mythology. If you’re lucky, you’ll find those that expand a bit into French mythos. This book is NOT one of those; this book is exactly as named, that being WORLD Folklore. It is comprehensive enough to be considered a must-have to anyone who studies mythology.
There is not a massive amount of information on each sort of faerie, but enough is given as a starting point and the amazing bibliography can be used to find more information on anything in the book. It is set in alphabetical order according to the name of the faerie, and finding the information you need is easy—that is if you are not me and stop along the way to check out other entries that catch your eye as you are on the way to the entry you were looking up.
All in all, I consider this an important volume to anyone who studies folklore, mythology, or is just a lover of Faerie. Your library will thank you for its addition, and you will look to it often.