Dick's Finest
Life turns upside-down for Joe Chip and 11 of his coworkers when they escape the aftermath of a bomb blast with the corpse of their employer. Various temporal and paranormal phenomena begin manifesting themselves, the cause of which is a mystery - and their lives may depend on solving that mystery.
Ubik is rather confusing, but in this case, to say that is actually to pay it a compliment. It's one of Dick's best novels, a highly enjoyable tale of distorted reality and bizarre metaphysics, by the end of which, Dick clears up the confusion and brings the story to a satisfying conclusion - until, that is, he throws another curveball in the final chapter.