Since a lot of people are running into problems with the texture limit in Octane, I thought I would post this collection of book covers I recently put together. There are about 50 book covers in the image. I provided a high res (4096x4096) and low res (2048x2048). In the high res, each book is 350 pixels high, so they wont look great in extreme close up shots, but as you can see from my preview, they work great for anything else. In the lower right of the image, there is a yellowish color that works good for the pages. In my preview, I just mixed a diffuse and glossy at 50%, still need to really finalize my material, get those specular bumps, ect , but just as this, it is working pretty well
Enjoy, and I hope these help some of you out.
http://www.graphicsbybailey.com/Octane/Books_High.jpg
http://www.graphicsbybailey.com/Octane/Books_Low.jpg