Enchanted books found in dungeons do not have a specific enchantment it just says enchanted book. you can also not combine the book with any tool, weapon or armor.
MC-88507
enchanted books with no specific name or atribute
Resolved
Duplicate
0
Thank you for your report.
However, your ticket has been resolved as a duplicate.
This issue has been linked to the original bugreport: MC-83897. You can find or add further information on that report.
Please search before reporting any bugs, as it's likely that one exists already.