Flow My Tears the Policeman Said: Philip Dick

This book followed the idea of the future as in "Do Androids Dream of Electric Sheep". This time there are 6's in the community as well as the new 7's who have empathy. At the end of the book the 7 is seen crying over his sister's death as well as the likely death of a 6 which he was responsible for framing in order to save his reputation over his sister's death. The US becomes a police state where students are locked up and one has to have all sorts of documentation and identification to stay out of the prison camps. The main character, Jason Taverner, is a 6 and a well known tv entertainer. Being a 6 he has a charming personality which draws everyone to him, his voice is hinted as being, just ok. He fights with a past love interest and she injects him with strange monster-like parasites. He wakes up at a hotel room and calls his girlfriend to pick him up, she doesn't know him. His boss doesn't know who he is either- He races around trying to figure out what has happened that he no longer exists, while trying to remain under the police's radar with forged documentation he obtains. He then meets up with the Police General's sister who is into drugs- she has a record of his, she knows he exists. She then overdoses and dies and suddenly people recognize Taverner again. The drugs created a parallel universe where he wasn't a celebrity. He is tried in her death, but found not guilty and his life goes on as before.