Answer: whodunits

AnswerCrossword Clue
WHODUNITSDonald Gordon's word for certain reading matter.
WHODUNITSMysteries.
WHODUNITSSome mystery stories
WHODUNITSDetective stories
whodunitsdetective story
whodunitsWHODUNIT, a mystery novel, also WHODUNNIT