The detective story itself is in a dilemma. It is a vein which is in danger of being worked out, the demand is constant, the powers of supply variable, and the reader, with each one he absorbs, grows a little more sophisticated and harder to please, while the novelist, after each one he writes, becomes a little more exhausted.
Being a nerd, which is to say going to far and caring too much about a subject, is the best way to make friends I know. For me, the spark that turns an acquaintance into a friend has usually been kindled by some shared enthusiasm like detective novels or Ulysses S. Grant.