Came here to say this. Pretty sure this works. Nice to see it worked out for you anyway, even if you did lose the Thorns enchantmentWill a MFR Disenchanted work on books? I feel like it would, but don't think I've tried.
If not, enchant a weapon with it, then disenchant the weapon back to book form. Upgrade from there as you had planned.
Personal opinion? Losing thorns isn't a great loss
Ladies and gentlepeeps, here we have the quintessential Minecraft player, in his natural habitatNot that I don't agree with the statement, but I hate losing anything. I must hoard all the things. For Science!
Not that I don't agree with the statement, but I hate losing anything. I must hoard all the things. For Science!