Katherine Applegate is the #1 New York Times-bestselling author of beloved and award-winning books for young readers, including Odder, Home of the Brave, Crenshaw, Wishtree, Willodeen, and The One and Only Ivan, for which she won the Newbery Medal. She is also the author of the Animorphs series, and a beginning reader series, Doggo and Pupper, illustrated by Charlie Alder. Katherine Applegate lives in Southern California with her family.

Charles Santoso loves drawing little things in his little journal and dreams about funny, wondrous stories. He is the creator of Happy Hippo and has illustrated many books, including Ida, Always – written by Caron Levis, which was mentioned in the New York Times as “an example of children’s books at their best” and the New York Times bestseller Wishtree and Odder books by Katherine Applegate. He moves around between different countries to live and work but calls Sydney, Australia home.