Huh? Not Spock's World? Not The Wounded Sky? Not some Greg Cox or Vonda McIntyre opus? I don't even remember what Avatar was about. Probably a direct consequence of having read every ST novel and short story that has appeared in officially-licensed printed form (as well as at least one that hasn't). They tend to run together after a while. And yet, a few, like most Diane Duane, most Greg Cox, and both of John Ford's pieces (just to name a few) stand out. And a few, like The Starless World, World Without End, the ever-popular Devil World, and anything Marshak & Culbreath wrote (for Bantam or Pocket) stand out for how bad they are.