Good Omens was a novel cowritten by Terry Pratchett and Neil Gaiman, later adapted into various other media, including the first season of a TV series now slated to also include a second season with an original plot.
In 2022, at the suggestion of Scott Sanford, Aristide Twain wrote a fanfiction story wherein which Jenny Everywhere interacted with the Good Omens universe, or, at any rate, a variation of it, under the title of PROSE: You've Been To Eden, I Perceive. The story starred the angel Aziraphale, one of the book's main protagonists.
Aziraphale, under his human alias of “Mr Fell”, was also mentioned in PROSE: The Folly of Men by Scott Sanford, alongside the imaginary book Biggles Goes to Mars. He was implicitly mentioned again Birds and Snakes, which also featured an unnamed guest appearance by a character heavily implied to be Crowley.