Question: Who wrote the novel that became the source material for this musical in which the American stage actor Matt Harrington played Mr. Wormwood?
Sentence (from "The Mr. Men Show"): The Mr. Men Show (sometimes simply called Mr. Men) is a British/American  animated television series based on the original "Mr. Men and Little Miss" books created in the late 20th century by British author Roger Hargreaves and his son Adam Hargreaves.
Relevant evidence: No