If you like heartwarming stories that are filled with kid heroes, kindness, New York landmarks, and care for animals, you will love this sweet story. It's the third book in the series but it easily can be read on its own. When her rat friend, Benton, translates for the sea lions at the zoo, Cordelia and her friend Issac learn that the sea lions are scared of a monster on the loose. They piece together clues and realize it's not a monster at all. But it is an animal who needs their help. Funny, tender, and a delight to read, this is perfect for any growing reader age 6 to 9.