Intensity by Dean Koontz

The red sun balances on the highest ramparts of the mountains, and in its waning light, the foothills appear to be ablaze.
- first sentence
Chyna is a psychology student sleeping at her friend's house when she hears a noise in the middle of the night. A serial killer is in the house and Chyna manages to evade him by hiding under the bed. Through a series of unusual choices and coincidences, Chyna ends up hiding in the back of the motorhome driven by the killer.
The story is tense and frightening. Chyna makes some stupid choices, but all in the name of saving another girl who is also the killer's prisoner. It is a bit predictable, but still entertaining.