The Bookcases added by the Charm mod do not accept any of the following:
Quest book, Lexica Botanica, Bestiary, Ancient Tomes, The Food Book, or any of the many other books which are included and used.
They currently only accept Minecraft books and Minecraft variants.
It would be very helpful for Quality of Life if the bookcases could accept all these extra books as well.

While I'm unsure how much configuration the Charm mod has, I'll take a look into it later this week. Shouldn't be too difficult to add the functionality if it's a whitelist.