Robert Kalan has also written the charming children's books Rain and Blue Sea, both illustrated by Donald Crewes. Kalan holds a master's degree in education and has taught reading to both gifted and remedial students from kindergarten through the fourth grade.

Donald Crews is the renowned creator of many celebrated children's books, including the Caldecott Honor Books Freight Train and Truck. He and his wife, Ann Jonas, live in New York's Hudson River Valley.

Donald Crews es el renombrado autor de dos libros merecedores del premio Caldecott, Tren de carga (Freight Train) y School Bus. Vive con su esposa, Ann Jonas, cerca del Río Hudson, en Nueva York.