The novel is a fast read with some good set piece action scenes, but suffers from poor world building and thin characterizations. Neither does it offer post-apocalypse fans much to chew on, as it's unclear how things fell apart other than some explanations about how modern life became too complex to manage. The protagonist is an author who correctly predicted the collapse of civilization and his experiences after he falls in with a caravan of travellers on their way to a spaceship in the American southwest.
There's nothing objectionable here, and it might be a good, if unchallenging, book for a young person interested in near future post-apocalyptic scenarios, but it is probably of little interest to most adult readers.
This was one of the books that shaped my worldview as a teenager, and I was delighted to discover it still reads well. Several lines from the book had worked their way deep into my thought processes, enough that I was surprised to discover them again. The story is disturbingly plausible and the characters just as diverse and real as I remember them.