I'm a big fan of PK Dick, although he was a crazy bastard, always high on drugs, paranoid, probably schizophrenic, and a curse to everyone who knew him (like his newfound friends in Vancouver found out). Hollywood has discovered PK Dick , but completely misunderstood or willingly misrepresented him. Blade Runner is not about hunting androids - it is about religion and what religious feeling means - is it about empathy that only humans can feel? Minority Report is not about high octane Sci Fi action, but about repressive state and police apparatus, where a man is never free until he dies. It is good that this book has not been made into a movie yet, as it is probably going to turn into some commercialized Hollywood bullshit. I always wondered why Hollywood didn't make into films William Gibson's books, since they are amazing, but I think now because it is difficult to put a twist on the dark nihilism in the books. And dark nihilism in movies doesn't sell.
Anyways, in Flow My Tears (a medieval flute song) Jason Taverner, a famous talk show and singer, dating the hottest singress on the planet, suddenly wakes up in a dingy hotel room without any IDs and no one knows who he is. The hotel clerk (a police snitch who plants a tracker on Jason) leads him to a fake document girl maker, Kathy, who is also a police informer (US is a police state at this time, after the Second Civil War), who makes him some documents, then removes the transmitter dots from them in lieu of sleeping with him. But Jason never sleeps with her because he discovers that she's batshit crazy and has a police handler who eventually sends her back to an asylum.
Jason tries to hook up with his previous acquaintances but no one knows him. He doesn't exist. He's an unperson. Eventually the police chief Felix Buckman, who is in an incestious relationship with his sister and claims to be a 'seven', which is above the 'six' than Jason is, a eugenics, genetically engineered human to be good looking and smart. Buckman finds the circumstances Jason's in funny, and knowing the police state of which he was once a Marshall, knows that the fame or money will not help Jason if he gets caught in the "system". The system destroys people.
Alys, Felix's sister, picks up Jason after he's released by Felix and she takes him to their house (they have an incest son in Florida), and tells him he was there before and they took drugs together. She's always on drugs and does some occult shit. Eventually she overdoses and dies on the new drug KR-3 which not only changes reality for the person who takes it, but for everyone around them as well. Since Alys was jealous of Jason's fame, she imagined a world in which he doesn't exist and it happened.
Jason escapes but Felix sets him up with the murder of Alys (which was an OD) and he goes to trial, but is exonerated and becomes even more famous that before. Felix is fired and goes into retirement on Fiji where he is murdered by the USA Police State when he writes a book exposing them. Eventually the police state fails and democracy comes back, forced labor camps area abandoned, and police checks and raids are things of the past.
What PK Dick is trying to say is that we are all Jasons Taverners. We can all be disappeared in an instant and no one is ever going to find us.