In a good way.
I read a late draft last summer, and The Autumn Republic ties up the Powder Mage trilogy with the surprising inevitability I've come to crave in the genre fiction I read. It was exciting, heart-breaking, and eminently satisfying.
I'm so sold on this series I accepted the offer to host the fifth one-chapter excerpt his publisher is providing. Here is Chapter 5 of The Autumn Republic, but I recommend reading chapters 1, 2, 3, and 4 first, if you haven't already.)
The Autumn Republic is available for pre-order from Books a Million, Barnes & Noble, iBooks, and Powell's, and I've been led to understand that you can get a signed copy directly from Brian McClellan himself.
It's also available from Amazon, finally.