Humor in science fiction often consists of taking science into the fantastical by exaggeration, while humor in fantasy is either stuff that is imagination run amok almost without limit or, more commonly successful, fantasy that is treated with doses of strange rationality. In both cases, it is the genre-bending of the expected that starts the laughter. In both cases, the writer is going to be lots more worried about being funny without being stupid than about being scientifically pure or heroically apt. One has to learn the rules of comedy as well as of speculative fiction.

• The Myth series by Robert Lynn Asprin, comprising:
  

  Another Fine Myth
  Myth Conceptions
  Myth Directions
  Hit or Myth
  Myth-ing Persons
  Little Myth Marker
  M.Y.T.H. Inc. Link
  

• Lancelot Biggs: Spaceman by Nelson Bond
• The Xanth series by Piers Anthony, comprising:
  

  A Spell For Chameleon
  The Source of Magic
  Castle Roogna
  Centaur Aisle
  Ogre, Ogre
  Night Mare
  Dragon on a Pedestal
  Crewel Lye
  Golem in the Gears
  Centaur Aisle
  

• The Silver Eggheads by Fritz Leiber
• Tales from Gavagan's Bar by Fletcher Pratt and L. Sprague deCamp, or the Harold Shea stories comprising, among others:
  

  The Castle of Iron
  The Land of Unreason
  The Carnelian Cube
  

• The Retief stories by Ron Goulart, including
  

  Retief's War
  

• The Kai Lung stories by Ernst Bramah:
  

  Kai Lung's Golden Hours
  Kai Lung Unrolls His Mat