The Diamond Queen's creator was an American journalist who is best known for writing short detective stories featuring who?
Jacques Futrelle Jacques Heath Futrelle (April 9, 1875 – April 15, 1912) was an American journalist and mystery writer. He is best known for writing short detective stories featuring Professor Augustus S. F. X. Van Dusen, also known as "The Thinking Machine" for his application of logic to any and all situations. Futrelle died in the sinking of the RMS "Titanic".
Harry Devlin (fictional detective) Harry Devlin is a fictional detective created by the British crime writer Martin Edwards. He has appeared in eight novels and eight short stories, and was described by Marcel Berlins in ‘The Guardian’ as ‘a charming but down-at-heel Liverpool solicitor with bruised emotions, a nice line in self-deprecation, and a penchant for Mersey low life.’ The series has received consistently good reviews.