Sentinels of Xen - The Guardians Saga, #2

The battle has ended, but the war continues. New enemies emerge, but the old ones are not forgotten. Alliances crumble under the weight of impending peril, and even the Guardians can no longer keep order. Still, the Sentinels persevere. Their methods differ, but their power is unmistakable. The only question is whether they'll save the Frame... Or destroy it.