Urban fantasy is a tricky subject. When its done right it can be full of amazing images and concepts like Neil Gaiman's Neverwhere, Jim Butcher's Dresden Files and Mike Carey's Felix Castor novels. When its bad it becomes either overrun with romance or erotica or simply loses its fantasy and becomes more thriller. Griffin's third Matthew Swift novel seems to be keeping brilliantly on track - she's developed her own pattern for these novels and it keeps working. So who is Matthew Swift?
Well Swift was a sorceror but he got murdered, never fear because he managed to resurrect himself with the blue electric angels that live in telephone lines (book 1). So far so good, then he managed to get summoned and somehow became Midnight Mayor of London, which means its his job to protect the city (book 2). Still keeping up? Good because in this book thankfully he doesn't gain another personality but he does manage to start a war, find a 'chosen one' and play monopoly with a seer in order to tell the future. Poor Swift, despite having a not unsubstantial amount of power at his finger tips he does seem to get dragged into a lot of bad situations that he doesn't understand. An unlikely hero to say the least. Yet he is our hero, and his dogged determination to do the right thing and maintain some sort of human-ish life (the electric angels quite like being alive) are what drives the series. Griffin's writing style may annoy those who like proper chapters and don't like different fonts or especially in this novel text message style speech, but I think it adds to the story. This is still a relatively new series so I recommend that you start reading it now and hope that it continues for quite a while yet.