The Merchants' War (Merchant Princes, 4) [Stross, Charles]

Miriam Beckstein is a young, hip business journalist in Boston. But her very well-connected family comes from an alternate reality, where they are a little too much like the mafia for comfort. Having escaped to yet anther world, Miriam remains in hiding from both her Clan and their opponents. With a nasty shooting war going on in Gruinmarkt, the world of the Clan, Miriam is shielded from danger, but also from information. And there's a secret yet for Miriam to discover; something that she's really going to hate--if she lives long enough to find out.