Saw
this article on Teleread about Andy Weir (author of
The Martian) writing some fanfic in the
Ready Player One universe that has apparently been accepted as canon by Ernest Cline, so I had to read it.
Lacero by Andy Weir is a very short story giving some background for one of the characters in RP1, so don't read it unless you have read RP1 already. Took me about 5 minutes to read.