The Stainforth family moves to a small town on the coast after buying an ancient fort that they plan to turn into a hotel. They soon discover that all is not right with the little town and the fort by the sea (of course, because this is a horror novel, after all), and find that they, and especially the young child David, are in mortal danger when these creepy, red, warrior, zombiesque creatures rise out of the sea and plant themselves outside the walls of the fort. The inhabitants of the town also take refuge within the walls of the fort, and then actual zombies show up, adding to the intensity of the confrontation.
I enjoyed this one. Clark is very good at evoking a strong sense of atmosphere in his tales and at describing images that are frightening on an almost primal level. He brings to life the coastal fort and the creatures that pop up out of the water and fog to threaten it. I give the book 4 instead of 5 stars because it reads a little choppily in parts, as if it were perhaps edited badly, and because the underlyting theme of sacrifice comes across as a bit forced in places. It is still quite a creepy book.