Megan Jo McDonald (born February 28, 1959) is an American children's literature author. Her most popular works is the series of books which concern a third grade girl named Judy Moody (written for grades 2–4). McDonald has also written many picture books for younger children and continues to write. Her most recent work was the Julie Albright series of books for American Girl.

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https://en.wikipedia.org/wiki/Megan_McDonald