Describe the solution you'd like
Could you make compatibility for Iron's spellbooks. So, when you use magic, you would gain magic xp. Also, ability to lock some of spells until you got some level.

Why is this feature needed
Iron's spellbooks is very popular mod nowadays, consequently, I think, you would gain more popularity and get support from people.

Describe alternatives you've considered
Ah...I don't know. I think you should check events or something like that of that mod.

This is something that should be handled in an addon.

For version 1.20.1 there's already a compat mod for PMMO + Iron Spellbooks: https://www.curseforge.com/minecraft/mc-mods/project-mmo-irons-spellbooks-compat

But, there is none for version 1.19.2