Implacable

Admiral John “Black Jack” Geary fears the greatest threat to humanity may be itself in this gripping continuation of the New York Times bestselling series.

As far from explored space as any human has ever been, Geary and the Alliance fleet are on their own, protecting a diplomatic mission in territory belonging to an alien species with still-unknown motives.

His already complex and dangerous mission is further imperiled by deadly challenges from other human factions seeking to harm or exploit...