Charles R. Smith Jr. is the author of sports poetry titles such as Hoop Kings, Hoop Kings 2: New Royalty, Hoop Queens, and Soccer Queens, as well as Pick-Up Game, Chameleon, and the Coretta Scott King Author Honor Book Twelve Rounds to Glory: The Story of Muhammad Ali. He is also the recipient of a Coretta Scott King Illustrator Award for his photographs in My People, an adaptation of the Langston Hughes poem. Charles R. Smith Jr. lives in New York.
Leo Espinosa is an award-winning illustrator and designer from Bogotá, Colombia. He is the illustrator of many books for kids, and his work has been featured by the New Yorker, the New York Times, the BBC, and more. He also illustrated Islandborn by Junot Díaz, a Pura Belpré Illustrator Award Honor Book. Leo Espinosa lives with his family in Salt Lake City, Utah.