The Haunted Stars

The Haunted Stars is a science fiction novel by American writer Edmond Hamilton. It tells the story of an expedition from Earth to a planet of the star Altair — a planet called Ryn, inhabited by humans like those on Earth. Against the wishes of Ryn's inhabitants, the team from Earth seek information about weapons technology used in an ancient space war. Their unsuccessful search ends in dramatic contact with another species, the ancient enemy of Ryn.