Heya! I've decomp'd all of the mods whose manuals/books I want to be able to use in the Akashic Tome and have gotten their classnames and placed them in the Item Class Blacklist part of the config. Since the Akashic Tome works by adding NBT to the book that is currently active in the "tome", and then adding a PlayerInteractEvent.LeftClickEmpty event listener to listen for left-clicking air while holding a converted item with the Akashic Tome NBT. Even with each item that I can possibly put in the Akashic Tome added to the Class Blacklist, I'm still unable to revert a book/manual back to the Tome.

S:"Item Class Blacklist" <
    cofh.thermalfoundation.item.tome.ItemTome
    electroblob.wizardry.item.ItemWizardHandbook
    hunternif.mc.atlas.item.ItemAtlas
    mcjty.rftools.items.manual.GenericRFToolsItem
    net.msrandom.witchery.item.ItemWitchHand
    net.msrandom.witchery.item.WitcheryItemBook
    thaumcraft.common.items.curios.ItemThaumonomicon
    toolbox.common.items.ItemGuideBook
    vazkii.patchouli.common.item.ItemModBook
    vazkii.akashictome.ItemTome
 >

Removing Immersive Combat resolves this issue.

Disregard, ID-10-T error (working in the wrong pack dir)