COME WITH ME TO TRAVEL WITH PROFESSOR AMPERIO VOLT'S TIME MACHINE! WE WILL REACH DISTANT ERAS, MEET GREAT FIGURES, ENCOUNTER WILD BEASTS, EXPLORE INTERESTING PLACES, AND SOLVE THE STRANGEST MYSTERIES OF HISTORY. WE WILL HAVE A GREAT TIME! I GUARANTEE IT, I, GERONIMO STILTON. Have you ever met Leonardo da Vinci? Talked with him? Tried his inventions before anyone else? Well, I have. And not only that, but I helped a lady who needed me. Just before returning to Mouse City, the Gate of Time and Space had a few more surprises and some terrifying encounters in store for me!