Thirteen-year-old Nanami Kosaki loves to read. Her local library has become a home away from home, and its books are her closest companions. But one day, Nanami notices that some of her favorite titles have begun disappearing from the shelves. When she alerts the library staff, they are quick to dismiss her. But just as Nanami is about to return to her reading, she spots a suspicious man in a gray suit. Should she follow him to see what he's up to?

That's when Tiger, the talking tabby cat, comes to the rescue. Together, they prepare to brave the frightening trail ahead that leads to the disappeared books. Will Nanami and Tiger overcome the challenges that await them? Why are faceless gray soldiers burning books in a stone castle? And what happened to Rintaro, the socially withdrawn hero who helped Tiger save books in a secondhand bookshop?

At a time of increased book bannings worldwide, The Cat Who Saved the Library is a powerful lesson to never underestimate the value of great literature. Warm, wonderful, and wise, it is also Sosuke Natsukawa's reminder to always think for ourselves.