Thank you to @BeckyMerilatt for recommending this book. I enjoyed Liesel and Po a bit more, but this was just as cute. A single dad and his daughter Cordelia care for Monsters. One day her dad and all the monsters disappear, leaving Cordelia on her own. She sets off on an epic adventure to bring them home. My 9 year old was not as interested in this book, but I would recommend giving this a try as she still enjoyed listening to bits and pieces.