Cthulhu Dark.
Dan can be reached via the Fediverse (some might call it Mastodon) handle @rpg@m.k0r.in or on itch.io and drivethru.
Dan Tiskifer is the alter ego of Norman Köhring. They are big sci-fi RPG fans and have a passion for writing stories for their players.
In the real, professional world, they do web development. More can be found at their homepage k0r.in that also lists all the social media accounts.
It's a puzzle.