Halo: Silentium

In the thrilling conclusion of the Forerunner Saga trilogy by Greg Bear, chaos descends upon the Forerunner empire as the terrifying Flood and unexpected allies threaten civilization's collapse. With internal strife weakening their defenses, the Ur-Didact and the Librarian uncover the dark history linking the Flood to the vanquished Precursors. As they confront the looming consequences of a mythic tragedy, the couple must decide on a shocking course of action to save the galaxy from unimaginable terror.