Okay, so I recently suggested folios, which would basically be bound containers for sheets (notes, sheet music, maps, recipes). Here's another book suggestion: tomes. In terms of the game, this would identify physically large-sized books. For example, books with at least two or three times the length and width. To give them extra sugar, they could have a higher character limit and maybe even have a larger reading display on screen. But it would just be nice to see extra-large sized books on library desks, among the shelves of smaller books.