It is a sad fact that Fred Hoyle--astrophysicist, cosmologist, nucleosynthecist, panspermicist and generally polymath extraordinaire--is not better recognized as one of our greatest sci-fi authors. Without a doubt, this book is one of the best sci-fi novels I have ever read. (FYI, I also like Arthur C. Clarke, Isaac Asimov, Ray Bradbury, Lewis Shiner, William Gibson, Philip K. Dick and H.G. Wells). All I can do is briefly outline the plot: An eccentric and somewhat egocentric radioastronmer...computer scientist detects a signal from the constellation Andromeda on Britain's largest radiotelescope that is obviously an intelligent message. Once decoded, it turns out to be a design for a highly advanced super-computer. Once built, the computer designs recombinant human DNA and grows highly advanced "human beings" with which it communicates in its apparent intent to take over the earth. Due to cold-war politics and the obvious advantages to the government of having a supercomputer, and not least to the protagonist's difficult personality, the government authorities won't believe him and refuse to pull the plug, moving this brilliant and exciting story inexorably along to its superb and tragic ending. The characters are complex and mutlifaceted and the story is a real thriller. Highly recommended.