A Game of Oubliette is the third Broodhollow book. It was announced on October 17, 2014 and is currently set to begin early in 2015. The plot of book 3 was mapped out on a whiteboard in Kris Straub's office during a planning session with Jerry Holkins ("Tycho"/"Tycho Brahe") of Penny Arcade. Kris noted the irony that the whiteboard resembled "something Zane would put together".
Book 3 is currently set to begin early in 2015, running at the same time as the Kickstarter project to publish Book 2: Angleworm in a physical edition.