Molly and Neil Sloan live in the mountainous region of Southern California. Molly is a writer, and Neil, a cabinet-maker, once almost being ordinated into religious fraternity.

Molly awakens in the early hours to an unusually torrential rainfall, the drops being luminescent and with a strange odour. Following other frightening occurences, they decide to move into the neares town and join their neighbours in defence of what they assume is to come. Molly is gradually aware of a task that she and Neil are predestined to perform.

Is it possible to stop the eroding of their known world by something they have yet to understand. Has science gone wrong, is it a technology far advanced, or something else. This is the basis of the story.

I have been an admirer of Dean Koontz for a long time. His books are always of the unexpected, and this one definitely follows this pattern. When you are reading, you have to keep looking up and around just in case YOU have something in your room to be afraid of. Its quite en eerie book as the evil portents are of things not yet seen, and this makes them more frightening.

I thoroughly enjoyed the build up of the story and the roles of the main characters in it. The horrific side was as much implied as written in "full view" which stimulates the imagination.

The only criticism I have is that the ending became rather moralistic and connected with a "higher Authority". This seemed to spoil the story and made one think "Oh, not that again" But nevertheless it's a book to be savoured and I am looking forward to the next one