Doreen Rappaport's nonfiction and historical fiction books have been acclaimed for their meticulous research and varied literary styles. She is the recipient of the Washington Post Children's Book Guild lifetime achievement award for the writing of nonfiction. Among her many award-winning biographies are Martin's Big Words: The Life of Dr. Martin Luther King, Jr., illustrated by Bryan Collier, a Caldecott Honor Book, Coretta Scott King Honor Book, Orbis Pictus Honor Book, and a Jane Addams Children's Book Award winner; and Abe's Honest Words: The Life of Abraham Lincoln, illustrated by Kadir Nelson, the Library of Virginia's Whitney and Scott Cardozo Award winner, a CCBC Best Book of the Year, and an IRA Teachers' Choice. Doreen lives in upstate New York.

Bryan Collier has illustrated more than twenty-five picture books, including the award-winning Trombone Shorty, Dave the Potter, and Knock Knock: My Father's Dream for Me, as well as City Shapes, and Fifty Cents and a Dream, and has received four Caldecott Honors and six Coretta Scott King Awards. He lives with his wife and children in Marlboro, New York.