This just in, PKD writes some weird stuff. This book is no exception. It's about a television star, Jason Tavenor, who wakes up in a motel room with no identification. This would normally not be a problem but this particular universe is a police state where not having ID is an extremely bad thing. Even worse, Tavenor discovers that no one knows him anymore, not even his closest friends. If you have eve read any PKD, you will not be surprised to discover that this all has to do with drug use.
The usual Dickian themes are here, drug use, authoritarian government, conspiracies, paranoia. No one can be trusted, not even ones own memories can be trusted. This is a good read.