Europe at Midnight

In a fractured Europe, new nations are springing up everywhere, some literally overnight.
For an intelligence officer like Jim it's a nightmare. Every week or so a friendly power spawns a new and unknown national entity which may or may not be friendly to England's interests. It's hard to keep on top of it all.
But things are about to get worse for Jim. A stabbing on a London bus pitches him into a world where his intelligence service is preparing for war with another universe, and a man has appeared who may hold the key to unlocking Europe's most jealously guarded secret...