Pierce Brown's Red Rising: Sons of Ares Vol. 2: Wrath Signed

While the Sons of Ares are on the run as their mission takes a deadly turn, Fitchner Au Barca’s time at The Institute is revisited. He learned many lessons there, but the most important of all was one of loyalty. The Peerless Scarred stand above all and look down on the rest. Their dismissal of one of their own proves to be a fateful error.