Tammi Sauer, a former teacher and library media specialist, is a full-time, award-winning children's book author of more than 30 picture books including Not Now, Cow; Mary Had a Little Glam; and Wordy Birdy. Getting kids excited about reading and writing is her passion. Tammi spent most of her childhood on a Kansas farm. Now, she and her family live in Edmond, Oklahoma, with one dog, two geckos, and a tank full of random fish.

DAN SANTAT a illustré les livres d'une multitude d'auteurs et a remporté plusieurs prix. Dan est également auteur-illustrateur de la bande dessinée Mini-justiciers et de l'album illustré Les aventures de Beekle: L'ami inimaginaire qui a remporté la médaille Caldecott en février 2015. Il habite en Californie.

Dan Santat wrote and illustrated the graphic novel Sidekicks, and has also illustrated many acclaimed picture books, including The Guild of Geniuses and The Adventures of Beekle: The Unimaginary Friend, which won the Caldecott Medal. He lives in Alhambra, California, with his family. Visit his website at dantat.com.