Dark Universe by Daniel F Galouye

Paperback. Condition: Good. 1971. Bantam. 2nd Printing.

Daniel F Galouye's first novel was published in 1961 and shortlisted for the Hugo award.

The survivors live underground, as far from the Original World as possible and protected from the ultimate evil, Radiation. Then terrible monsters, who bring with them a screaming silence, are seen and people start to disappear. One young man realises he must question the nature of Darkness itself.