Andrew D Devenney of Superhero Necromancer Press is Kickstarting the release of the fourth volume in his system-neutral 'zine series on the Rainy City. This one is called Beasts of the Outer Swells.
https://www.kickstarter.com/projects...?ref=user_menu

It will list a variety of creatures that can be encountered beyond the Rainy City, at the end of the world.

The previous pdfs are available for purchase through DriveThruRPG.com; hard copies can be ordered from the publisher.:
https://www.drivethrurpg.com/browse/...romancer-Press

Volume 1: A Visitor's Guide to the Rainy City.

Volume 2: Flott's Miscellany Vol. 1

Volume 3: Flott's Miscellany Vol. 2



NB: While I am not a contributor to these volumes, nor an employee of the publisher, I have been an enthusiastic backer of the previous 3 volumes through Kickstarter. I think they're simply brilliant.