Another breezy and enjoyable PKD read, one that holds off on giving many answers until the end so you're confused along with the protagonist most of the way.

He's played around with a half-similar premise in some other books, but this one hits a paranoid, nightmarish quality like the first half of North by Northwest. He also lets himself get surprisingly sentimental, more like The Man in the High Castle than some of the other PKD books I've been reading recently.