Rosemary Wells is an author and illustrator of picture books and has written many novels and nonfiction books for young readers, including Mary on Horseback, a biography of Mary Breckenridge that won the Christopher Medal. While researching a historical novel about the Civil War, she came upon a 200-word fragment by Willie Lincoln about a trip taken with his father, and the idea for Father Abraham was born. She lives in Connecticut.
PJ Lynch is an Irish artist who has illustrated several books with American themes, including The Christmas Miracle of Jonathan Toomey and When Jessie Came Across the Sea. To illustrate Lincoln and His Boys, he traveled with Rosemary Wells to the Lincoln Museum in Springfield, Illinois, and assembled hundreds of contemporary photographs, daguerreotypes, and etchings of Lincoln. He lives in Dublin.