[1] She and her husband Harvey Fischtrom, writing as Harve Zemach, collaborated on several picture books including Duffy and the Devil for which she won the 1974 Caldecott Medal.
Margot Zemach died in Berkeley, California on May 21, 1989, of amyotrophic lateral sclerosis, or Lou Gehrig's disease.
[4] The husband-and-wife team produced 13 books together, often simply as "Harvey & Margot Zemach" although he wrote and she illustrated.
For Duffy and the Devil: a Cornish tale (1973), Margot won the Caldecott Medal from the American Library Association recognizing the year's best-illustrated U.S. children's picture book.
The Princess and Froggie (Farrar, Straus and Giroux, 1975) was a collection of stories written by Harve and Kaethe, illustrated by Margot.