Luigi has a knack for games and puzzles. But sometimes it feels like the cards are stacked against him. Until a carnival arrives in town and Luigi gets the chance of a lifetime--the opportunity to work for the world-famous Professor Marvelmous, a dazzling, banana-hat-wearing barker who puts the show in showman! When the carnival closes, Professor Marvelmous leaves behind a mysterious puzzle box along with a clue. A clue that will lead Luigi and his friends on a fantastical treasure hunt to a prize beyond anything they could imagine--if they can find it!

Can Luigi crack the codes and unlock the box's secrets? Will there be puzzles? Of course! Balloons? You bet! Will it be fun? Hello! It's a Lemon-cello! BONUS! Can you solve the hidden puzzle inside?!

The Lemoncello books are laugh-out-loud, puzzle-packed must-reads for classrooms and homes across America. Look for the whole series!
Mr. Lemoncello's Very First Game (the prequel)
Escape from Mr. Lemoncello's Library (also available as a graphic novel)
Mr. Lemoncello's Library Olympics (also coming soon as a graphic novel)
Mr. Lemoncello's Great Library Race
Mr. Lemoncello's All-Star Breakout Game
Mr. Lemoncello and the Titanium Ticket
Mr. Lemoncello's Fantabulous Finale