Really interesting piece of alternate history. This book, by far, is one of Phillip K. Dick's least sci-fi themed works, instead it builds a credible world based on what would have happened if Germany and Japan had won WWII. Very unique and interesting characters fill the book and drive the story at different times. The story focuses on the different things each character believes about reality, and how each character is able to cope living in a totalitarian society. As per usual PKD, the story starts to go off the rails a bit toward the end, however it is definitely still worth a read. I think the overall meaning of theme of the book is that reality is both always plural and always mutable.
Published Oct. 8, 1962 by G. P. Putnam's Sons.