An Ace Double book

A Man Obsessed tells the terrifying tale of a man with death on his mind. All Jeffrey Meyer could think of was Paul Conroe's death in exchange for the death of his father. Not even the growing psychoses in the world around him would deflect him from this goal. But who was hunting who?

The Last Patrol tells the tale of one of the last ragged ships of the Patrol, sent out to explore the old stars. In reality sent out to clear the way for someone's power grab. But it's these ragged explorers who were to have the last laugh, for when their ship finally dies they find themselves on a planet that is strangely beneficent to all the races of mankind aboard.