I finished this book earlier this week: a 1974 science fiction novel by Philip K. Dick, Flow My Tears, The Policeman Said is about a genetically enhanced pop singer and television star who loses his identity overnight. The story is set in a futuristic dystopia, where America has become a police state after a Second Civil War. The novel was awarded first prize in the John W. Campbell Awards for the best science fiction novel of the year in 1975. It was also nominated for a Nebula Award in 1974 and a Hugo Award in 1975. (Wikipedia).
The drug-induced alternate-reality explanation for Jason Taverner's identity loss was, for me, convoluted and unsatisfactory. However, the novel is quite poignant in its meditation on love through the experiences of Police General Buckman. Dick also does a nice job of creating a unique dystopia, as always, but Do Androids Dream of Electric Sheep? and Man In the High Castle do it better.