Originally posted by Power Ring:
Working off memory isn't one of those a report by an alien zoo worker who was dispatched to earth to pick up superman & supergirl for a Zoo?
Yes, it was a story called "Protected Species" that ran in the 1984 UK annual, "The Superheroes" (it's sometimes erroneously listed as having run in the '84 Superman annual). The other Superman prose story by Moore was called "I was Superman's double". It ran in the 1985 UK Superman annual and was about a cab driver bragging to his passenger that he once filled in for Superman (the passenger turns out to be Clark Kent). PDFs of both of these can be read here:
There was also a Batman story called "The Gun" which ran in the 1985 UK Batman annual. It traced the path of the gun that was used to kill Batman's parents.