From the coauthor of I Funny and Max Einstein--and with 100+ weeks on the the New York Times Times bestseller list--the LEMONCELLO books are laugh-out-loud, puzzle-packed, MUST-READS for classrooms and homes across America.

When Kyle Keeley learns that the world's 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, Kyle is 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 catch every clue and solve every puzzle to find the hidden escape route!

Enjoy bonus content in the back--extra puzzles, an author Q & A, and more! And don't miss 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!

44 STATE AWARD LISTS AND COUNTING
100+ WEEKS ON THE NEW YORK TIMES BESTSELLER LIST
* "A worthy successor to the original madman puzzle-master himself, Willy Wonka." --Booklist, starred review