David A. Adler is the author of many popular books for children, including biographies, math books, and Judaica. His strong interest in history and biography led to his bestselling Picture Book Biography series. He lives in New York State with his wife and family.

John Wallner has illustrated dozens of books for children, including David A. Adler's Honest Abe Lincoln: Easy-to-Read Stories about Abraham Lincoln, a Bank Street Best Book of the Year. Alexandra Wallner has written and illustrated many biographies for children about remarkable people, including Lucy Maud Montgomery, Grandma Moses, Abigail Adams, and Beatrix Potter. She and her husband live in Mexico and often collaborate on their books.

Alexandra Wallner has written and illustrated many biographies for children about remarkable people, including Lucy Maud Montgomery, Grandma Moses, Abigail Adams, and Beatrix Potter. She and her husband live in Mexico and often collaborate on their books.