"Fast-paced, smart, and action-packed...a real page-burner." --Chris Grabenstein, #1 New York Times bestelling author of the Mr. Lemoncello's Library series A 2020 Texas Lone Star Reading List Pick From New York Times bestselling author Stuart Gibbs comes the first novel in a thrilling new series about the world's youngest and smartest genius who's forced to use her unbelievable code-breaking skills...