Florian is 12 years old and has just moved to Washington. He's learning his way around using TOAST, which stands for the Theory of All Small Things. It's a technique he invented to solve life's little mysteries. But when he teaches it to his new friend Margaret, they uncover a mystery that isn't little. In fact, it's huge, and it involves the National Gallery, the FBI, and a notorious crime syndicate known as EEL. Can Florian decipher the clues and finish his homework in time to help the FBI solve the case?

A New York Times bestseller! In the tradition of Nancy Drew, four kids and one grandfather in Miami tackle a decades-old mystery in this first book full of “atmosphere, history, and lively humor” (Publishers Weekly, starred review) in the Sherlock Society middle grade series from New York...

“Fast-paced, smart, and action-packed...a real page-burner.” —Chris Grabenstein, #1 New York Times bestselling author of the Mr. Lemoncello’s Library series From New York Times bestselling author Stuart Gibbs comes the first novel in a thrilling new series about the world’s youngest...

A New York Times bestseller! A GMA3 Summer Reading Squad Selection! “Ingeniously plotted, and a grin-inducing delight.” —People “Will keep young readers glued to the page…So when do I get the sequel?” —Beth McMullen, author of Mrs. Smith’s Spy School for Girls In this thrilling...

In the thirteenth book in Stuart Gibbs’s New York Times bestselling Spy School series, superspy middle schooler Ben Ripley goes off the grid to eliminate a cybersecurity threat. After a devious computer hacker pulls off the CIA’s worst-case scenario, shutting down power networks all over the...