Mysteries are also very widely read by SF fans (and not so much by
fantasy fans). I think there are two ways in which SF and mysteries
are alike. First, they're constrained by logic and certain real-world
limits. Second, they give the author the opportunity to investigate a
new and unfamiliar piece of culture (the detective is often working
outside his normal milieu).
Sir Arthur Conan Doyle
Dorothy L. Sayers