I'm not going to go into any big spoilers but I really enjoyed it. It's definitely my favourite of the three so far and I love David Mack's style. I had a sense of dread throughout the entire book about what was coming, but when I got to the end I was actually really satisfied by how everything turned out.
Still, it is only book three of five. I want to know what is going on with the President and the numerous other questions left to be answered. I have very old fashioned tastes and as dark as things might get, I want my endings to be happy ones. Still not sure what end point The Fall is heading towards, but I am very excited to find out.