If you haven't read any of the merchant prince novels because you've read other Charles Stross science fiction and think you won't like them, you're wrong, you will love these books.
If I'm being really honest I wish I'd waited and read the previous one, this one and the next one all at the same time as they read like one big novel, with a cliff hanger ending in the last one and this one. But the series is very compelling and I just have to read them as they appear because of the cliff hanger endings, which is the point of them I guess. There's nothing worse than waiting a year or more for the next in a series and just loosing interest completely in the intervening time, (David Louis Edelman springs to mind here).
There is one more coming next year to finish off this storyline but this series could run and run, there is just so much there to explore in the worlds Stross has created, and every book teases us just a little more with the back story.
This is an absolutely essential read but not for someone to pick up who hasn't read the previous books in the series, it doesn't stand alone. I'd thoroughly recommend going and getting the first one, by the time you've tracked them all down and read them, there will only be a short delay until The Trade of Queens is published.
My only regret is not being able to wait a month after it was published to get it for this price, I paid an American book chain twice as much and by the time it arrived it was on amazon uk for less. Ho hum.