It’s less “canon” and more “recycling”. I mean, the major ones featuring Pigtown and the related characters Micah and Rod are my first few stories, “Losing Control”, “The Dangers of Smoking,” “Sinful Revenge,” and “The Man You’re Looking For,” and all four of those form a loose canon. Beyond that, it’s mostly been the occasional one off, like Cop Daddy One and Two, which is in fact a Pigtown story even though Pigtown isn’t mentioned by name. I have a much longer Pigtown story started in the Patreon archive, but the characters bear very little resemblance to their earlier incarnations, and there’s a lot more demonic possession involved.
Long story short, there isn’t really a canon, at least not one I can link you to, so much as this bar I keep writing about where strange things happen, in the same way that the Special Investigations Bureau pops up whenever I happen to write something using found documents (“Letters From Prison,” “The Smoker Tapes,” etc.) but there isn’t really any larger world lurking behind them, or at least no world that I might not rip apart and put back together at no notice what-so-ever.