Nancy Thorndike Greenspan is the author of The End of the Certain World and the co-author of four books with her late husband, child psychiatrist Stanley Greenspan. She lives in Bethesda, Maryland.

Nancy Thorndike Greenspan is the author of The End of the Certain World and the co-author of four books with her late husband, child psychiatrist Stanley Greenspan. She lives in Bethesda, Maryland.