This is a great book about a naturalist who discovers a darker world hidden in the shadows of nature. If you loved fairy tales when you were a kid, and want a darker, grown-up version, this book is for you. The book itself goes back and forth between the journal entries of the naturalist discovering the world of dangerous fairies, and his drawings and descriptions of these malevolent creatures. Del Toro's mark is evident, as the writing is surreal and almost cinematic. I am looking forward to the accompanying film!