Do you have what it takes to be the new owner of Mr. Lemoncello's epic gaming empire? Find out in this fantabulous finale to the beloved, New York Times Bestselling Mr. Lemoncello's Library series!

Mr. Lemoncello's ENTIRE game-making empire is up for grabs!

It's time for one last fantabulous challenge with Mr. Lemoncello-the world's most famous gamemaker! This time everything is on the line--literally! Mr. Lemoncello has invited thirteen lucky 13 year-olds--including his biggest fan, Kyle Keeley-- to compete in the final games. The winner of these games will become the new owner of Mr. Lemoncello's ENTIRE GAME MAKING EMPIRE!!! But uh-oh--someone is trying to destroy Mr. Lemoncello empire and all it stands for: imagination, games, books . . . knowledge! Can Kyle Keeley stop them and make his dreams come true?

Get ready for a whirlwind adventure that takes us from the lions of the New York Public Library to the Choose Your Own Thrill-Venture Roller Coaster inside the brand-new Lemoncelloland amusement park, filled with codes and clues, adventure and mystery, and surprise cameos from across Chris Grabenstein's many series. So sit back, relax and prepare to have your imagination take flight...you are on your way to Lemoncelloland!