When you're the GM, you've gotta come up with everything else in the world that doesn't consist of the party memebers. That's tough. There's guides out there that can help you with NPCs in the world. But they give you, what? 20? 30? Maybe 100 characters? That's nothing. The Ultimate Character Compendium gives you over 4 thousand. The book is up on Kickstarter now.
From the campaign:
Every Class. Every Archetype. Every Race. An entire bookshelf of character crunch. The most comprehensive character tool of all time, for the Pathfinder Roleplaying Game.
Truly, the Ultimate Character Compendium.
Over 4,000 instantly-usable NPCs with complete statblocks, covering a wide spectrum of difficulty levels and challenge, assembled in 11 full-color PDFs and/or hardcover books.
If you play, or run, a Pathfinder game, these books will save you time and inspire more diverse and interesting play. It's as simple as that. Thousands of detailed, ready-to-use PCs/NPCs and animal companions. Tons of high-quality, intricately-detailed crunch.
The campaign is up and running now. It's set to gof or another 25 days.