I've been playing D&D in one incarnation or another since 1986 (or thereabouts, I was young and my memory isn't brilliant). I'm a bit of a rules nerd, and I love maths and science. I think paladins are cool, and I think that they really aren't that hard to enjoy from either side of the table.
In 2015 I was writing some rules for armies, and happened to mention it in a PM to Jason Nelson of Legendary Games, who asked me to send him what I had. So I did. There's a chance it might appear in print.
Then in early 2016 I realised that there was a gap in the kingdom rules, and there was a forum thread that was tangentially related to said gap, so I again PM'd Jason Nelson (since he'd popped into the thread), and he said "send me what you write, we'll look at publishing it". And then, 2 weeks before PaizoCon 2016, he said "what name did we decide on? I'll order some art", and I panicked and realised that I'd better get moving with writing more than the couple of pages I'd done by that point.
The course of writing didn't run smooth, but I finished it, and now it's published under the Legendary Games Ultimate Plug-ins line.