This was the first Dean Koontz novel I ever read. He writes with style and imagination, and he maintains an electrifying emotional and narrative pace throughout the book: this is page-turning fiction at its dynamic best.
Is this a thriller or is this horror? It was filmed in the USA as a fairly bland thriller which stayed close to the book in most of its aspects. It has, however, recently been transformed into an excellent French horror film, "Haute Tension" ('High Tension' in the States, 'Switchblade Romance' in the UK), which had added a whole new dimension to the tale, albeit diverging somewhat from the book towards the end.
A young woman is unwilling witness to the slaughter of her friend's family and pursues the murderer by stowing away in the man's mobile home. Koontz manages the story, which is basically one of hide-and-seek, with professional exactitude. He knows every inch of the settings he uses, has worked out to the precise second whether someone could hide here, move there, hide there, move again.
It is a very well handled novel, both from the perspective of his narrative story-telling skill and from that of the artistry of resolving a plot. It's a big enough book, but its subject is claustrophobic - escape in tight spaces and close quarters. Well handled, tense, gripping, and an excellent read.