I found myself needing books for another project so, rather than being stuck modeling books over and over, I thought to make myself a large selection to pull from that are easy to texture for many, many projects. For a variety of reasons, it is often my goal to make something simple, versatile, and easy to use.
There are five variations of each of six sizes of books. Each different size of book has its own separate textures baked, to maintain continuity of texture scale despite the books being different sizes. All of the books utilize the same UVs.