A. Book feels despondent because she has lost her identity. Not only has she been sitting on a dusty shelf in an antique store for decades, but it's been so long since anyone read her that she's forgotten what story she holds on her pages! All of A. Book's friends try unsuccessfully to help her, but it's not until a young girl finds her and takes her home that she rediscovers her purpose in life when the story that dwells within her comes alive through the girl's imagination.