If you want to make crime pay, why not plot and write a series of cozy mysteries? Sales have increased in leaps and bounds since the 90s and fans of the genre are always avidly on the lookout for new writers. Mysteries are cozy when they feature amateur detectives who solve the crime. Think Agatha Christie and you find the genteel Miss Marple knitting her way through murders in tranquil English villages and the peculiarly foreign Hercule Poirot who is totally averse to country life.