After Do Androids Dream of Electric Sheep (and who doesn't start with that one), this is the first novel by Philip K. Dick that I read. I think I picked it at random because I liked the title. The book takes place in an alternate, dystopian 1988 (the future at the time of writing), in which a pop star loses his identity overnight: his friends and lovers don't remember him and no one has ever heard of his music or TV show. It is as if he's never existed. The world has become a police state after the "Second Civil War," and everyone must carry ID cards or be sent into a forced labor camp.
This is one of Dick's better novels, though not my favorite that I've read (that would probably be Ubik). I've gotta say though, I really wish they'd repackage his entire line. They could do so much better.