Forerunner Halo (03): silentium

In the last years of the Forerunner empire, chaos rules. The Flood - a horrifying shape-changing parasite - has arrived in force, aided by unexpected allies. But the roots of the Flood may be found in an act of barbarity, carried out beyond our galaxy ten million years before. Only the Ur-Didact and the Librarian - husband and wife pushed into desperate conflict - hold the keys to a solution.