Mr. Lemoncello's ENTIRE game 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 to compete in the final games. The winner will become the new owner of Mr. Lemoncello's ENTIRE GAME 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!