Charlie and the Chocolate Factory meets A Night in the Museum in this action-packed New York Times Bestseller from Chris Grabenstein, coauthor of I Funny, Treasure Hunters and other bestselling series with James Patterson!

Kyle Keeley is the class clown and a huge fan of all games—board games, word games, and particularly video games. His hero, Luigi Lemoncello, the most notorious and creative gamemaker in the world, just so happens to be the genius behind the construction of the new town library. Lucky Kyle wins a coveted spot as one of twelve kids invited for an overnight sleepover in the library, hosted by Mr. Lemoncello and riddled with lots and lots of games. But when morning comes, the doors stay locked. Kyle and the other kids must solve every clue and figure out every secret puzzle to find the hidden escape route!

Don't miss the next puzzle-packed adventures—Mr. Lemoncello's Library Olympics and Mr. Lemoncello's Great LIbrary Race!

"Discover the coolest library in the world." —James Patterson, #1 New York Timesbestselling author

44 STATE AWARD LISTS AND COUNTING -- INCLUDING THE SUNSHINE STATE AWARD!

Starred Review, Booklist
* “An ode to libraries and literature that is a worthy successor to the original madman puzzle-master himself, Willy Wonka.”

Starred Review, Kirkus Reviews
*"Full of puzzles to think about, puns to groan at . . . this solid, tightly plotted read is a winner for readers and game-players alike."