Although I picked up Underground Railroad first, I ended up starting Underground Airlines in the middle of it and found myself enjoying this one more. However, that is not really a fair point of comparison because they are completely different books, and this one is just more up my usual alley. 
 The pacing was pretty good and had enough twists and turns to keep me wondering without going over the top. However, what I really enjoyed was how grounded it was in today's reality. Although this is supposedly an alternative history, so many issues still felt incredibly real. This was only compounded by the fact that this takes place in Indianapolis and many of the landmarks referenced are regulars on my daily commute. That felt a bit weird at times.