EccentricTome version: 1.0.1
Patchouli version: 1.18.2-67
Forge version: 40.0.36
Minecraft version: 1.18.2

Patchouli books: Cyclic, Mystical Agriculture, Simple Storage Network
Non-Patchouli: Cooking for Blockheads, RFToolsBase

The Tome combines fine with various books; however, when going to switch with right-click, it seems like they're all piled on top of each other.

This should be fixed in v1.0.3, which has now been published