I have a lot of paperback books with these little round holes in the covers. No, it didn’t puzzle me: Robbie bites the covers while I’m reading them.
Whoever shot this video got off easy. All this cat wants to do is pull out the bookmark so you lose your place. Notice that there are no books written by me on the bookshelf. That is disheartening. Not a single one. Betcha the cat would leave those alone, if there were any.