This is a set of 5 novels by a Scottish author called Paul Johnston. Like Ian Rankin's Inspector Rebus novels, his books are set in Edinburgh but in the 'near' future (2020s). They are set in a Dystopian time and in essence are police thrillers.
http://www.paul-johnston.co.uk/books/quint.htm
http://www.paul-johnston.co.uk/books/quint.htm