The Incredible Umbrella

When J. Adrian Fillmore bought the odd-looking bumbershoot, he had no idea it would soon whisk him away from his prosaic life as an English literature professor and plant him smack in the middle of a Gilbert and Sullivan cosmos. Before long he lands in jail, saves Sherlock Holmes from death, battles Count Dracula, befriends the Frankenstein monster, and fights, of all things, an army of isosceles triangles!