Double Dan is a 1924 crime novel by the British writer Edgar Wallace. It released in the United States under the alternative title of Diana of Kara Kara.

In 1927 it was adapted into a stage play of the same name by Wallace.

Edgar Wallace (1875 - 1932) was an English writer.

Born into poverty as an illegitimate London child, Wallace left school at the age of 12. He joined the army at age 21 and was a war correspondent during the Second Boer War, for Reuters and the Daily Mail.