The second novel of the Forerunner Saga trilogy by science fiction legend Greg Bear--set in the Halo universe and based on the New York Times bestselling video game series One hundred thousand years ago. In the wake of the apparent self-destruction of the alien Forerunner empire, two humans--Chakas and Riser--are like flotsam washed up on very strange shores indeed. Captured by the Forerunner known as the Master Builder...