The Final Problem by Arthur Conan Doyle

Holmes faces off against Professor Moriarty, the criminal mastermind who threatens to destroy him. As Holmes and Watson flee across Europe, the chase ends at the Reichenbach Falls in Switzerland, where both men appear to plunge to their deaths. The plot is suspenseful and dramatic, designed by Doyle to end Holmes’s career. Holmes’s supposed demise shocked readers worldwide. It’s a defining story that introduces his greatest enemy and sets up a legendary return.