What's your favorite book that nobody else has heard of? You know, not Little Women or Huckleberry Finn, not the latest best-seller... whether they’ve read them or not, everybody "knows" those books. I'm talking about the best book that, when you tell people that you love it, they go, "Huh? Never heard of it?"</i>
The Stone and the Flute by Hans Bemmann.
Honourable mention to:
Long John Silver by Bjorn Larsson