Night Terrors (Buffy the Vampire Slayer (Simon Spotlight))

Banished to the realm of dreams, the Night Terror stalks its victims as they sleep. By replacing another's soul with its own, the demon can assume anyone's physical body and wreak havoc in the real world. But the effect is short-lived. Human bodies soon break down under the tremendous stress of the transfer, and the Night Terror is forced to resume its imprisonment. That is, until it discovers Buffy's secret and imagines the Slayer would make an ideal - and permanent - host ...