During his years as a publisher, Jess Brallier became known for breaking rules and launching bestsellers. Under his creative guidance, the Planet Dexter imprint produced a string of hits including the New York Times bestselling Grossology and its sequels. Linking storytelling and gaming literacy, he launched the world's largest kids' site, Poptropica, and digitally published Jeff Kinney's phenomenal Diary of a Wimpy Kid. Jess is the author of over thirty books including Who Was Albert Einstein? (NYT bestseller) and Tess's Tree (illustrated by Peter H. Reynolds). Jess is a graduate of the University of Pittsburgh (B.A.) and Boston University (M.S.).

As an illustrator in both New York and Los Angeles, Jack Keely's projects have included over thirty books for kids. The characters he created for the bestselling Grossology series have come to life in an animated film and in a video game, and as robotic performers in the record breaking international Grossology museum exhibitions. Jack is a graduate of Rhode Island School of Design (BFA) and Cranbrook Academy of Art (MFA) and has taught illustration and graphic design at several universities.