This review assumes you read Jhereg.
The story takes a jump back in time (a few years earlier), and gives us another mystery to solve involving criminals and the noble houses.
The style of the book is the same, quick, no nonsense, and more background of Vlad is revealed as the plot progresses.
That said, I did feel the plot was weaker than the previous book. For example, we find out how Vlad meets his wife, yet it's presented in such a way that it looks like a 'the plot demanded it' outcome.
Overall, a solid continuation.