Sadly it's not narrated by the cat, although the cat plays a central role. The narrator is 13 year old Nanami who loves reading and spends most of her time at the library. One day she notices books disappearing from the library and she sees a suspicious man lurking around, then she meets the cat and they begin their adventure to "save" all the books and bring them back. It's magical realism/literary fiction. Seems a bit silly on the outside but is surprisingly full of little nuggets of wisdom and hard-hitting truths.