This is PKD at his best. A continuously moving narrative that spirals and pingpongs through realities, shattering narrative frames as it devolves ever deeper into the minds of its characters. It's hard to tell what's going on through most of this novel, but it's clear something is happening. Much of the pleasure of reading this thing comes from trying to grasp the mysterious forces at work and fathom the layers of deception. That and particularly clever writing, strong dialogue, and characters who are just believable enough. Ultimately, it's a pretty bleak critique of technology and capitalism mixed with some meditation on the nature of consciousness. You know, classic PKD.