I know what you mean OP. But in other sense, Martin and Abercrombie are two different beasts, not worth comparing. I love the character of BloodyNine btw, but my favorite is Major West.
Anyway most people who have read this trilogy will recommend you go on Abercrombie's standalones in order they were published. They happen in the same universe and feature some of the familiar characters. Here are the links
Best Served Cold (The First Law World #4)
I see Goodreads labels it as #4 in first law world, though the original series is labeled under "the first law" only.
Other two books are:
The Heroes
Red Country