Stuart Gibbs is the author of five New York Times bestselling series: Spy School, FunJungle, Moon Base Alpha, Charlie Thorne, and Once Upon a Tim—as well as the new nonfiction series Spy School Secret Files. He has written screenplays, worked on a whole bunch of animated films, developed TV shows, been a newspaper columnist, and researched capybaras. Stuart lives with his family in Los Angeles. You can learn more about what he’s up to at StuartGibbs.com.

William Alexander writes unrealisms for readers of all ages. His work has won the National Book Award, the Eleanor Cameron Award, the Librarian Favorites Award, the Teacher Favorites Award, two CBC Best Children’s Book of the Year Awards, and two Junior Library Guild Selections. As a small child he honestly thought that his Cuban American family came from the lost island of Atlantis.

Ken Jennings is the New York Times bestselling author of Brainiac, Maphead, Because I Said So!, Planet Funny, and 100 Places to See After You Die. In 2020, he won the “Greatest of All Time” title on the quiz show Jeopardy! and later succeeded Alex Trebek as the show’s host. He lives in Seattle with his family.

Wesley King is the is the #1 New York Times bestselling author of over a dozen novels for adults and young readers. His work has been translated for release around the world. 

Mark Kelly has served as the US Senator from Arizona since 2020. He was a captain in the United States Navy when he commanded the final mission of space shuttle Endeavour in May 2011. A veteran of four space flights to the International Space Station, he is a graduate of the United States Merchant Marine Academy and holds a master’s degree from the US Naval Postgraduate School.