Margaret Peterson Haddix (born April 9, 1964) is an American writer known best for the children's series, Shadow Children (1998–2006), and The Missing (from 2008). She also wrote the tenth volume in The 39 Clues, published by Scholastic.
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Margaret Peterson Haddix (born April 9, 1964) is an American writer known best for the children's series, Shadow Children (1998–2006), and The Missing (from 2008). She also wrote the tenth volume in The 39 Clues, published by Scholastic.