Prepare for an epic collision between two entirely different worlds! Geronimo Stilton is no stranger to magic. He has been called into the Kingdom of Fantasy fourteen times before, where he bravely rode giant dragons, met shimmering fairies, and defeated wicked witches. But this fifteenth adventure brings a shocking new twist. This time around, Geronimo does not have to travel anywhere. The entire Kingdom of Fantasy has magically crashed right into his hometown of New Mouse City! You will join him on a frantic quest as legendary creatures and spells suddenly flood the normal streets. It is up to you to help Queen Imaginaria restore order before the chaos becomes permanent. Can you find a way to put everyone back in their rightful dimensions? Jump into this thrilling, highly illustrated chapter book for a fast-paced fantasy adventure right in the middle of the city!