Kate Elliot calls her book Cold Magic an “Afro-Celtic post-Roman icepunk Regency fantasy with airship, Phoenician spies, the intelligent descendants of troodons, and a dash of steampunk (or at least some gas lamps).”
There's really not much I can add to that. That's the book in a nutshell. You can quibble about it being more Victorian than Regency but why bother? The book has airships and mages and weres (oh, my) and it all seems to work. The mages love magic and hate technology. Not unexpected but the reason they hate technology is at least interesting.
The heroine, Catherine, is forged into marrying a young Cold Mage. She later finds out that her family has a lot of secrets and she's not exactly who she thought she was. When she learns that her cousin is also in the Mage House's cross hairs, she undertakes a harrowing journey to get to her before the mages can.
Cold Magic is the first book in the Spiritwalker Trilogy. The main question of the book is answered by the end but the story is to be continued. Hopefully the next book will come out before I forget too much of this one. There are a lot of minor characters who add flavor to the book. It's possible that many of them will turn up again in other books.