Forge 2092-1.10.2
I have three mods that use the guide-api, which are Silent's Gems, Modular Routers, & JAPTA, and one of the books appear with a black and red book texture instead of the normal book texture by that mod. For example, Japta's book is usually grey and black, but sometimes it appears solid black with red pages.

(In this pic, Silent's Gems guide book is glitched)

Could I get a client log?

Log:
fml-client-latest .txt

This should be solved in the 1.11 builds.