Since then, she has continued to write poetry, historical fiction, and nonfiction biographical works for children. She said in a 2008 interview that one of the most important poems she has written was "Moses: When Harriet Tubman Led Her People to Freedom": "Those inspired words came together with Kadir Nelson's soulful paintings and Ellice Lee's brilliant art direction in a perfect publishing storm. Moses propelled my career to another level." "Moses" has won a Caldecott Award for illustration, as well as an NAACP Image Award for an Outstanding Literary Work for Children, and became a "New York Times" bestseller.