This is a review of Kos City (Swords of Kos fantasy campaign setting.)
The product comes with two files, the city book and a color coded map. It's nice to have the map as a separate PDF since I can have them both up at the same time on my computer. The map is color coded with codes for Government, Mercantile, Temple, Artisan and Slum quarters, the map is also keyed to the 44 locations and where they are in the city.
The book itself is robust at 79 pages; there is an introduction and brief explanation about the world. The intro is wrapped up by a table of contents giving the name of the establishment as well as what it is. This is good in case you don't know what the Sign of the Heron is; it gives you a heads up as GM as to what you need to prep. The general layout of the book is good, it's easy to read, line art interspersed with photos breaking up the text.
The book is system less so you could easily pop it into your campaign; each location is given a complete write-up describing the interior and people inhabiting the local. The NPC's have good backgrounds and would easily fit into any other city/campaign. Each location also has a number of character hooks that you can use as a cue for an adventure.
What more would I have liked? This is minor stuff but I would have liked the map key number next to the name of the title of the location, so I could easily glance at the number to find it, additionally I would have liked an alphabetical index so I could find it faster while flipping through it
However the book is well worth its cost and I think it would be a good addition to a GM's library and I recommend it as a buy.