The first in the popular Fu-Manchu mystery series introduces English sleuth Denis Nayland Smith and his companion, Dr. Petrie, to the satanic Dr. Fu-Manchu, a cunning Chinese criminal mastermind who means to rule the world. Flavorful atmosphere, fast-paced action, and colorful characters enliven this 1913 classic.
Here's a sample of other books in this Dover category
Trent’s Last Case by E. C. Bentley Masterwork of the genre features detective Philip Trent in a case involving the murder of an American financier. "One of the few genuine classics of detective fiction." — The New York Times.
The Mysterious Affair at Styles by Agatha Christie When an aging heiress is found fatally poisoned, Belgian sleuth Hercule Poirot is brought in to unravel many mysteries in this classic tale of murder, jealousy, and greed.