The first novel in the Forerunner Saga trilogy by science fiction legend Greg Carry—set in the Halo universe and predicated on the New York Times bestselling video game series!

100,000 years ago, the galaxy was populated by an excellent selection of beings.

But one varieties—eons beyond all others in both technology and understanding—achieved dominance.

They ruled in peace, but met opposition with quick and brutal efficiency.

These were the Forerunners—the keepers from the Mantle of Responsibility, the next stage of life in the World’s Living Time.

And then they vanished.

This is their story.