Although he has all kinds of adventures in his self-invented racecar named 'Racecar', his main aim is to find his parents and defeat their enemies.
Otto enters a racecar competition in which he expected to win $1,000,000 to sponsor research to stop disease.
His rival Fullsom, who overhears Otto and his aunts' communication, but cannot understand the conversation as they talk backwards.
At the end of the book, Otto's parents write him a letter revealing his true identity as well as his 'assignments'.
[3] The use of anagrams and palindromes occurs mainly when characters are speaking, and occasionally will appear in descriptive text, but not usually in the narration.
'[1] According to Perlman, the books are based on stories she used to tell her son, Jake, and they incorporate many of the suggestions he made at the time.