Paizo's Extinction Curse adventure path for Pathfinder has a lot of twists and turns, including a detour into a circus. They've been going into a lot of detail about this adventure, and now it's time to go further still. They've posted up an article that looks into different aspects of the path, and particularly, that circus adventure, The Show Must Go On.
From the post:
Our series of blogs exploring the Extinction Curse Adventure Path includes Come One, Come All, to the Extinction Curse Player’s Guide!, the web flash fiction Extinction Curse: Waiting in the Wings, and Extinction Curse Extravaganza! Now, let’s start looking more deeply into what each volume adds to the Pathfinder Second Edition game. (I don’t see spoilers in this blog, but they are ahead, so proceed accordingly.)
The Show Must Go On is a Pathfinder Second Edition adventure for four 1st-level characters. This adventure begins the Extinction Curse Adventure Path, a six-part, monthly campaign in which the heroes lead a traveling circus as they unravel a plot to eradicate all life from the Starstone Isles at the heart of the Inner Sea. The adventure also includes advice on how to run a traveling circus, new circus-themed rules, and a menagerie of monsters both wondrous and wicked.