Strangers by Dean Koontz
All over the country are suffering from fear. Bone-chilling terror strikes them. And they don't know where the fear came from. Some of them suffer in their dreams, some while awake. Some are triggered by harmless objects, and some become obsessed with the moon. But slowly, hidden memories are beginning to leak through and lead them all to the Arizona desert. But finding the truth doesn't bring peace.
Sci fi disguised with suspense. Really cool. It's a big book, but the suspense keeps the pages turning.