The Downstairs Room by Kate Wilhelm

Paperback. Condition: Good. 1970. Dell.

What happens when . . .

An all-powerful killing machine is equipped with a human brain on the brink of madness?

A group of apes are injected with human intelligence and build their own strange empire?

A child with an other-worldly intellect is locked in mortal combat with his own down-to-earth father?

A hand-picked space team convenes at a countdown that can mean the start of a new era - or the end of mankind?

You'll find out when you enter . . . THE DOWNSTAIRS ROOM.