Like humans, cats love a good book. Not for reading, of course. If cats could read, we’d have them read Harry Potter books all day, so we could discuss how weak Old Voldy actually is (he couldn’t even take over a freaking school!). No, cats love books because they want to rub their faces on them.
But they won’t rub their faces on any book—only the book you’re currently reading. The moment you put the book down, your cat will immediately lose interest. Pick it back up again, and it’s suddenly the most interesting thing in the world. Cats are weird like that.