A companion / sequel to the Last Argument of Kings, Best Served Cold brings back some of the minor characters and introduces a new main character.
One thing that I particularly liked was the amount of distance from the main characters of the previous book.
At first I worried a little that the standard brush-strokes were going to be too reminiscent of the trilogy. We have new instances of our injured/crippled character and our gruff-yet-well-meaning Norseman. But, Abercrombie develops these two into absorbing characters in their own rights.
Keeping an eye open for the next book.