Brancalonia Spaghetti Fantasy Setting Book: A campaign setting derived from Italian culture and media where the PCs are lovable scoundrels constantly looking for the next big job.
BEOWULF: Age of Heroes: A 1 player 1 GM setting in a mythical version of Early Medieval Britain and Scandinavia based on the tales of Beowulf. Review.
So I'm going to finish Koryo first, but after doing City of Brass I'm debating whether to review Brancalonia or Spheres of Power & Might next. The Spheres books are such that they'd be best reviewed together rather than separately, but in comparison to Brass shouldn't be too hard.
Grim Hollow: A dark fantasy setting that got a notable bump from Critical Role. Currently available as a Campaign Guide and supplementary Player's Guide.
Recently did a huge update of the thread, editing all the books posted here and linked reviews into the OP for easier reference. We now have 44 entries (46 if we count two-parter books) and 16 reviews!
It's been a year and two months since I started this idea. Barring a delay or two I'm still going strong, and I'm proud of the work put into this. To everyone who's been following along, thank you for your continued interest!