Gennifer Choldenko is the New York Times bestselling author of over ten children's books, including Chasing Secrets, No Passengers Beyond this Point, and Al Capone Does My Shirts, a 2007 Newbery Honor selection. Over 2 million books from the Al Capone at Alcatraz series have been sold worldwide. Gennifer lives in the San Francisco Bay Area with her family.
Dan Santat is the illustrator of Photo d'école ratée and Grognonstein, both written by Samatha Berger, and the Ricky Ricotta series, written by Dav Pilkey. He is also the author-illustrator of the graphic novel Mini-justiciers and the picture book Les aventures de Beekle : L'ami inimaginaire, winner of the 2015 Caldecott Medal. Dan lives in Alhambra, California.