The Great Gatsby by F. Scott Fitzgerald
Fitzgerald was not the first person to write a book about the many trials and pitfalls of the American Dream, nor was he the last. But he was certainly the first to write a book where someone says the words "Open the whiskey, Tom. And I’ll make you a mint julep. Then you won’t seem so stupid to yourself," and for that this would be one of my favorite books even if it wasn't already one of my favorite books.