This is the sequal to Fourth Wing. Violet Sorrengail, now in her second year at Basgiath War College, learns her brother who was previously thought to be dead, is still alive. He is operating as a lieutenant colonel in a rebellion base that is fighting against the Venin, the threat that her country been hiding for years.
I was shocked by Iron Flame, the ending was really unexpected and I'm excited to see how the next book in the series, Onyx Storm, resolves everything.
