A new radio telescope picks up a complex series of signals from the Andromeda constellation -- signals which prove to be a programme for a giant computer. When the computer begins to relay the information it receives from Andromeda, the project assumes a vital importance, for scientists find themselves possessing a knowledge previously unknown to man -- knowledge of such a nature that the security of human life itself is threatened. Condition is Acceptable: This used book shows wear to edges and cover, creases to corner of cover, spine, and writing inside. See photos for condition.