Green Lantern Corps, Volume 2: Alpha War

When the Alpha Lanterns, an internal police force for the Corps, arrest Green Lantern John Stewart for the murder of a fellow Lantern, it sends shock waves throughout the entire Corps. It is up to Guy Gardner and the rest of the Green Lanterns to break Stewart out and bring down the emotionless Alpha Lanterns. Meanwhile, the shadowy agents of the Third Army prepare their takeover schemes. Can the Corps reunite in time to stop them, or will their fight against the Alphas pave the way for the Rise of the Third Army?