Read this immediately after finishing the Mistborn series. Funny thing is, I picked up Alloy of Law first. It's sort of a stand-alone book, not really part of the original trilogy even though it is set in the same universe. And I do think it could be read on its own -- no need to be intimately familiar with the Mistborn 'verse. But I'm glad I waited to read the first 3 first. It didn't take me long, anyway; I practically inhaled this series.