Cats are so much smarter than we think they are. Neko communicates with other cats in other houses using books.
When I bring a bag of books home from the library, Neko can’t wait to get to them. I set them on the counter and within seconds, he has sniffed and rubbed against them, knocking them onto the floor. Then he joins them on the floor by pushing them around on the floor, climbing on top of them, rubbing his nose on the spines of the books, and finally laying on top of them.