Stephen King's only (?) picture book for small children is... pretty much a picture book for small children. Yes, if you've read The Dark Tower Charlie's grin becomes considerably more menacing, and there's something about the illustrations that feel like they belong more to the larger Towerverse than in this book. In the end, the kids won't get it and the fans don't really need it, but I like that it's out there. (Even in Holmberg's typically clumsy Swedish translation.)