Hauled screaming and kicking out of the depths of Rappan Athuk to infest a campaign world somewhere near you, here is a fine selection of monsters collected from the 'new monsters' section of the Rappan Athuk adventures and kitted out with full descriptions, complete Pathfinder RPG statblocks and even complete lairs all ready to raid.
The collection includes some 28 monsters, ranging in CR from a lowly one-half to a mighty 20, and presented in alphabetical order so watch out that you select ones appropriate to your party (or you may discover how good they are at running away, a sadly neglected skill amongst modern adventurers in these days of well-balanced adventures!).
So out they come, gibbering and oozing, ranging from tiny albino cave spiders to zombie hordes, devouring mists and river trolls. Perhaps your luckless characters will run into a stirge swarm (sorry, the stirge was the very first monster I ever encountered, the first time I played D&D in 1977!). Or some witch lights and water weirds will lead them astray.
They are a fine collection of monsters and the added bonus of detailed lairs ready for them to inhabit and your characters to raid make this an excellent addition to your monster collection. You can never have too many monsters, after all!