The pattern was created by knitter Lori Layne. It looks a bit similar to Harry Potter’s “Monstrous Book of Monsters” The cover is available on Ravelry.com and is available for purchase from around the world, with prices starting at $99.99. The cover has a tendency to bite anyone who tries to open it, but it doesn’t bite back at anyone who reaches for the book’s spine. The pattern is available from the site of the pattern on the website of the book.”]
Source: https://gizmodo.com/monster-book-covers-protect-your-favorite-reading-mater-5920859