A Connecticut Yankee in King Arthur's Court by Mark TwainRead about another entry on the list.
Mark Twain tells the story of an engineer who is transported back in time to King Arthur's court, and how he fools them into believing he is a sorcerer. Hank Morgan uses his knowledge of technology and history to impress the people of medieval England. He predicts an eclipse, sets of fireworks, and destroys Merlin's tower with lightning and demolition charges.
A Connecticut Yankee in King Arthur's Court is one of Michael Brooks's top ten time travel books and the book Roman Simic most likes to re-read.
--Marshal Zeringue