Modeled on the old-school science fiction Ace doubles here is a fun and quirky tête-bêche format book that addresses the question of the best relationship of current-day humans to non-earth terrain(s). Reprints from the surreal Association of Autonomous Astronauts are the bulk of one side, while the other features pieces by science fiction authors, among others, and both yea and nay have heartfelt introductions from the editors.