Challenge to Become Better Read in Crime Fiction

I love crime fiction, but tend to read the same few authors. This list is comprised of crime fiction and true crime by 198 different individual authors, as well as a duo, and a collaborative novel by The Detection Club, whose members included Agatha Christie, G.K. Chesterton and Dorothy L Sayers, who all have individual works on this list too. This is by no means a comprehensive list, and there are sure to be favourites I have accidentally overlooked. For authors of series, I have chosen the title in which the detective first appears according to Goodreads. There are a couple of exceptions.