Virus - Vector and Virus, #2

Two powerful alien forces, the sadistic half-human Brotherhood and the savage Hivers, are determined to destroy all human life on Earth. All that stands between them and the achievement of their goal are the old Earth team and their Raider allies. Enemy actions force the Earth team to deploy on an emergency reconnaissance mission. The search for information quickly expands into a desperate battle against growing horror, terror, and despair.
They discover far more than anyone could imagine, including clues as to the true nature of their enemies and the darkest secrets of their homeland. While their skills and determination sustain them through the dangers springing up on all sides, their resources and their strength, individually as well as those of the team and their allies as a whole, are swiftly draining away. When all is lost, and only one option remains, they seize it.
They launch a desperate near-suicidal assault at the very heart of their vastly superior enemy. The eagerly awaited sequel to Vector delivers with a vengeance.