Aftermath is a short story giving a brief outline of what happens after Fair Rebel. It's told from the perspective of Gayle (The Lawyer) in their interactions with Simoon (The Accountant) and the rest of the Circle. I'd recently read Turning Point and Swainston's love for Simoon really comes across - he's an autistic character and she's clearly put a lot of love and care into his perspective.
It's short, and definitely left me wanting more - it was a really interesting account of what happened after Fair Rebel. As a die-hard Jant fan, it didn't quite have the same edge to it that the core books have, but it was a great interlude and top-up while we wait for the next Fourlands book.