Fantastic. I tell you this does not feel like a book that was written almost forty years ago. Its vision of the future still stinks of possibility, it is eerie and ominous, it is Goeorge Orwell meeting Iain M. Banks except the result is subtler than 1984 and more philosophical than Banks in his weediest, most long drawn moments. 
 Dick is master at telling a perfectly profound, many layered story in the most simplest of languages while maintaining a pace and level of activity to match any action packed cheap crime paperback on the bookshelf you never had. 
 Our protagonist is a cop called Rick who hunts escaped androids, who are just machines good at imitating humans right? Not quite right, as Rick finds out. his job is to give possible androids (who are biological constructs that are physically almost identical to human beings) a souped up hybrid test that combines the classic Turing test and a gimmick-laden polygraph test. if the test finds that the subject is an android, he or rather 'it' is 'retired' or in other words gets it in the head. 
 This system meets with a few complications when a new type of android enters the market, and some of them escape after killing their human overlords. The Nexus 6 is more human than most humans. But they are still machines, so Rick has to track down and kill them. but in the process he goes through experiences that make him reflect and come to a few realizations of his own. 
 The action is tight and twisted, and understated somewhat, i don't know if this is the affect of time but i felt Dick could have done a lot more to soup things up. Fight sequences and what would have been heavily suspenseful moments are delivered in a deadpan, factual tone that is at most times anticlimatic. There is also a pseudo religious element to the story that is not quite explored all the way. Yes i read this in one day.