I put these two items together in an anvil and crashed my client. I didn't expect to be able to combine the two really, but of course crashing sucks, so here is the report.
Crash report:
https://pastebin.com/FNa20ASv

Screenshot showing the two items, and their enchantments.

Somehow there's a null enchantment on the tome, which is... interesting. Not sure exactly what to do about that.

I don't entirely know how you got a null enchantment on the tome, but the vanilla code paths aren't really within my reach to edit.