Over the course of Margaret Wise Brown’s fifteen-year career, she published over one hundred books with dozens of publishers. She worked with almost every prominent illustrator of the day, and her accomplishments as an editor were paralleled only by those of Ursula Nordstrom, head of Harper’s Department of Books for Boys and Girls from 1940 to 1973. At the time of her premature death in 1952, Brown was involved in a number of projects, including a collaboration with Alvin Tresselt, and a foray into songwriting.1 Today, her most popular book remains one of children’s literature’s best sellers. An estimated 49 million copies of Goodnight Moon have been sold worldwide since its first publication in 1947, with 13.5 million copies published just in the last ten years. The Runaway Bunny, Brown’s second most popular book, has sold 7.5 million copies.2 Brown’s impact on modern children knows no—