Geronimo Stilton : The Journey Through Time - The Test Of Time (#6) - Hardbound

I, Geronimo Stilton, found myself traveling through time once again! While testing his latest time machine, Professor von Volt accidentally brought some history into the present. Tops, our triceratops friend; Helen of Troy; Attila the Hun; Charlemagne; and Christopher Columbus were all in present day New Mouse City! My friends and I climbed into the new time machine to take them back in time. But the Cheese-O Sphere wasn't working perfectly! Could we return everyone to their proper place in time and make it back in one piece?