Just finished Harry Turtledove’s Great War series. I can hardly wait to dig into American Empire now, and I’m sure once that’s done I’ll be quick to start on Settling Accounts.
I think one thing that makes them just so gripping, is that because he keeps switching from one character to another, constantly hopping from one place to another all around the war in Canada, the USA, and the CSA, there’s never a slack moment.