Leviathan (The Lost Fleet: Beyond the Frontier #5)

Two Syndicate World star systems have fallen prey to a mysterious fleet of warships controlled entirely by artificial intelligence. Geary knows that the warships were developed by his government to ensure security, but malfunctioned. If the Syndics learn the truth, the war with the Alliance will resume with a vengeance. Now Geary must track the A.I. ships to their secret base in the Unity Alternate star system and end the conflict—at any cost.