Let me say up front that this book probably doesn't actually deserve the rating I'll give it. Its mix of snark, fast pace, and brazen creativity hooked me. The worldbuilding is whacky with a side of hijinks but holds itself together by being internally consistent (or vague enough to fake it) and not cheating just to let the plot or characters do interesting things.
But I'll admit that my main engagement was Bailey. She's gutsy and determined and always does the right thing even when she knows the stakes are high and favorable outcomes unlikely. And that's exactly my jam. There's a hint of special girl about her that escapes being a Mary Sue by including a huge case of fatalistic insecurity. It's well-earned or it wouldn't have worked and crops up even when inconvenient and troublesome. It was fortunate that Quinn was immune and that his delight in her was infectious to those around him. But seriously, her life sucks and no small part of it is how she expects it to do so for the foreseeable future.
Quinn was a lot of fun, too, though maybe a little too perfect (both "perfect for her" and "perfect in general"). I bought it and didn't care for Bailey's sake. Well, that and he was the perfect snark partner.
It would have been easy to kill the entire story if the plot had been weaker or if the pacing had dragged. Bailey and Quinn come together around a third into the story and that's really early for what is, at heart, a romance. Their connection is solid, but Bailey's deep-seated insecurities are such that we really needed that long tail on the romance to completely invest in it. I was delighted that Blain didn't feel the need for any trickery to throw random conflict to "spice" things up. There's no dark moment or other shenanigans and I'm so glad it worked out as well as it did (and without being boring or weak).
I laughed out loud enough, and was charmed so thoroughly, that I'm giving this all five stars. It's a fragile five stars, though, and if any of those elements don't connect for you, it's unlikely you'll agree. The worldbuilding and creativity romp are dialed up to eleven and if you don't buy in, it's going to be a slog. I bit, though, and was entertained.
A note about Chaste: There's sex, including Bailey's first time, but none of that hits the page. There are no explicit descriptions and the flirting stops short of being racy. You get indications and expressions of appreciation and such, but to me, it remains chaste. If you're at all strict about chaste designations, you'll probably disagree. This is weird in an alt-history contemporary fantasy and the only thing keeping this from PNR categorization I think.