"It is Princess Harriet Hamsterbone to the rescue when Heady the hydra's egg is stolen, but her search leads her to a castle accessible only by a rat with a very long tail"--
When second-grader Eugene and his family move to a new neighborhood and he starts at a new school, he has a chance to bring out his superhero alter ego, Captain Awesome, to find the kidnapped class hamster.
The last member of a line of explorers, unfailingly optimistic Pigsticks hires a hapless delivery hamster named Harold to be his companion for a quest that wends through jungles, deserts, and mountains in search of the Ends of the Earth.