Don't be fooled by the picture of a Princess Leia wannabe on the cover of Knits For Nerds. Yes, it has Star Wars knitting patterns in it, but it also has two from Harry Potter. One pattern is called "Secret Beaded Bag" and was inspired by Hermione's bag in the final film. You know, the one where she kept a tent, an entire library's worth of books, and anything else she thought the trio would need as they tried to find the missing Horcruxes.
The second pattern is called "Book Wizard" and is a book bag. I can't show you the picture of the bag because I don't have permission to do so, but I can give you a link so you can see it. Click here and you can see the pattern of bag, as well as all the other patterns in the book, of which there are 30 in total.