As an adult, you may have read the grown up version of Dewey Dewey: The Small-Town Library Cat Who Touched the World. This child's version is even more charming! Dewey kind of brings out the child in one and here is a book to share with your children of the intrepid cat who becomes the Spencer Library cat.
The author, Vicki Myron, finds Dewey in the library drop box and after nursing him back to health decides he will become a library cat. My grandchildren liked the story of Dewey and liked sharing his thoughts as he rambles through the library, hits story time and generally charms the hearts of all he encounters.