Over 100 Weeks on the New York Times Bestseller List On 44 State Award Lists Discover what James Patterson calls "the coolest library in all the world" in this fun-filled, action-packed bestseller from the much-loved coauthor of I Funny and Max Einstein "A worthy successor to . . . Willy Wonka." --Booklist, starred review When Kyle learns that the world's most famous game maker, Luigi Lemoncello, has designed the town's new library and is having an invitation-only lock-in on opening night, he's determined to be there But the tricky part isn't getting into the library--it's getting out. Because 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 bonus content in the back of the book--extra puzzles, an author Q&A, and more And look for the puzzle-packed sequels--Mr. Lemoncello's Library Olympics, Mr. Lemoncello's Great Library Race, Mr. Lemoncello's All-Star Breakout Game, and Mr. Lemoncello and the Titanium Ticket "Full of puzzles to think about and] puns to groan at . . . this solid, tightly plotted read is a winner for readers and game-players alike." --Kirkus Reviews, starred review

CHRIS GRABENSTEIN is the Agatha and Anthony Award-winning author of The Crossroads and The Hanging Hill as well as several adult thrillers and I FUNNY, a #1 New York Times bestseller that he coauthored with James Patterson. Chris also used to do improv, write TV and radio commercials, and has written for The Muppets. Chris was born in Buffalo, New York, and moved to Chattanooga, Tennessee, when he was ten. After college, he moved to New York City to become an actor and writer. Chris and his wife JJ live in New York City with three cats and a dog named Fred who starred in Chitty Chitty Bang Bang on Broadway.