Douglas G.

After discovering an unexplainable void in the fabric of space at the edge of the solar system, Ian MacGregor secretly spent his life unraveling the finding. He did not know his discovery would reshape humanity's understanding of its past and future. So when his son, Peter, left Earth aboard the explorer-class vessel Shackleton on an ambitious mapping of the solar system's furthest reaches, they did not expect to be confronted with a 13,000-year-old mystery. Now millions of miles from Earth, Peter MacGregor and his crew must reach into the void to save the survivors of an extinct civilization.

Ryland Grace is the sole survivor on a desperate, last-chance mission - and if he fails, humanity and the Earth itself will perish. Except that right now, he doesn't know that. He can't even remember his own name, let alone the nature of his assignment or how to complete it. All he knows is that he's been asleep for a very, very long time. And he's just been awakened to find himself millions of miles from home, with nothing but two corpses for company.