Who created the Mr. Men?

"Mr. Men" is a series of children's books by English author Roger Hargreaves commencing in 1971. From 1981, an accompanying series of "Little Miss" books by the same author, but with female characters were published. A similar series of animal characters known as Timbuctoo started in 1978. After Hargreaves's death in 1988, his son Adam Hargreaves began writing and illustrating new "Mr. Men and Little Miss" stories like "Mr. Good", "Mr. Cool", "Mr. Rude", "Little Miss Scary", "Little Miss Bad" and "Little Miss Whoops".