Most people have heard of Dewey, the library cat of Spencer, Iowa. There are two books about him and a movie is being made starring Meryl Streep. But did you know there are other library cats? Check out the Mental Floss blog to learn about eight of the 301 cats who currently reside in libraries around the world. Some of these literary felines have Facebook pages, others have blogs or newsletters. One even had his own library card!