The legendary Jennell Jaquays along with Darcy Perry deliver the goods with this 56 page adventure setting. Ducks are PCs. 'Nuff said.
The book is quite lovely with full color on the inside. The art by Jaquays and Perry is deliciously evocative (check out pages 5, 16, and 18 in particular). There are lots of NPCs with which to interact, such as Bigus Duckus, Coduck the Barbarian, Daisy Ladyhawke, and The Grey Moulter.
The entire region of Reedy Bend seems to live in fear of the duck-like dragon Daffyd Platypyros, a horrifying monster to be sure.
This book is FULL of playful language and puns. When I was writing Rabbits & Rangers I was dipping my toes into the "funny animal" genre. But truly Quack Keep dives in head first and I absolutely adore it for that reason. In fact, the first thing I realized upon flipping through it was that this book, being system agnostic, is PERFECT for use with Rabbits & Rangers! And I have it on my bucket list to run a little Reedy Bend campaign for R&R.
There's a lot more to this than I have touched upon. There are maps, lots of encounters and magic items, story hooks, and all kinds of fun and funny gems about roleplaying the Fowl Folk.