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

Jeff Chen is a writer who also makes crossword puzzles for The New York Times and other major publications. He’s an avid rock climber and an inconceivably terrible bridge player and likes ideas, people, and things with nerd cred. Jeff lives in Seattle with his wife and two children. Visit him online at JeffChenWrites.com.