Helaine Becker is an award-winning author who has written over eighty books for children. Her picture books include You Can Read, illustrated by Mark Hoffmann; Sloth at the Zoom, illustrated by Orbie; and Counting on Katherine: How Katherine Johnson Saved Apollo 13, illustrated by Dow Phumiruk. She has also written non-fiction, chapter books and poetry. She is a two-time recipient of the Lane Anderson Award and a winner of the Silver Birch Award and the Bank Street College of Education Cook Prize. Helaine lives in Toronto. Liz Wong was born in Honolulu, Hawaii, where she spent her early childhood painting and clambering about in mango trees. Winning the first-place trophy in her elementary school poster contest encouraged her to pursue art instead of a sensible career in finance like the rest of her family. Liz holds a BFA in art and a BA in anthropology from the University of Washington and currently resides in Edmonds, Washington, with her husband and son.