The History of Tom Jones, a foundling by Henry Fielding.
Unless you had advanced placement, you probably were not assigned this book in high school. You might have read it in college, or you might have tried getting away with watching the movie. Great movie. But my college professor had a question about the female lead character’s hair color– brown in the book, blond in the movie. It’s well worth reading– baudy, funny, and fun. You can get it FREE at manybooks.net,