Following up on The Octonauts & The Sea of Shade is the newest book about the undersea explorers - The Octonauts & The Frown Fish. From Immedium and writer/illustrator Meomi, in this (3rd) episode, "the crew finds a frowning fish that
makes everyone sad. However, they decide to cheer it up by sharing
their favorite hobbies." You can pick up the 36 page hardcover book for $15.95.