This is one of the better books in the "Civil War"-series. It stays in the centre of things, and reveals several crucial points about the politics and motivations behind the Civil War waged between super heroes for and against the "registration act", which forces them to reveal their identities to the authorites.
The charm of this particular installment, is that it is mpstly seen from the perspective of regular humans, embodied in two journalists, and deals with more devious maschinations than mere spandex-guys punching each other.
Very well drawn, and with a well-planned and exciting story, told bit by bit. The only annoying part, are some small moral-pieces comparing the Marvel civil war to other American war stories.
Apart from the main "Civil War" book, I recommend "Frontline" 1 & 2 as the essential reads for anyone, who want the main stories. Also a good place to start.