As the fourth, and apparently final, book in Fantasy/Romance `The Edge' series, Steel's Edge takes a darker tone than the previous three books. The humour (and banter) that characterised the earlier stories is still there, but the main protagonists in Steel's Edge, Charlotte and Richard, are very damaged characters who are, essentially, on a quest to end a human trafficking network. As Richard's brother, Kaldar, puts it (to Richard) `you finally managed to find a woman as tragically noble as yourself'.
Giving plot details would be spoiling the fun, because this is a very engrossing book, albeit one that is best read after having read the earlier Edge books. In short, the husband and wife team, Ilona Andrews, have pulled off yet another great book: I think that it would be fair to say that I devoured it, rather than read it (and was sufficiently motivated to post my first Amazon review). If you are unfamiliar with their work, then you might start with having a look at some of the free fiction available on their blog (e.g. [...]), but I can fully recommend both the Edge Series (on the Edge, Bayou Moon, Fate's Edge and now Steel's Edge), as well as the Kate Daniels urban fantasy series that they are best known for (Magic Bites, Magic Burns, Magic Strikes, Magic Bleeds and Magic Slays). UK publishing issues mean that it has been difficult to get ebook versions of their books, but that is now changing.