Earl Derr Biggers 's Books

A very well recieved series by Earl Derr Biggers are the books, featuring tropes. The most popular books are Seven Keys to Baldpate, Love Insurance, The Agony Column, Fifty Candles, Charlie Chan Mysteries - The Agony Column, Charlie Chan [1] The House Without a Key, Charlie Chan [4] The Black Camel, Charlie Chan The Silent Corpse, Charlie Chan [6] The Keeper of the Keys, The Chinese Parrot, Charlie Chan [5] Charlie Chan Carries On, which was published in 2022.