War in Heaven is the second book of a trilogy by Gavin Smith. The first of which is Veteran. If you liked the first book you will love the second. It carries on from where the first left off, although for those people who start mid sequence there is a few pages of catch up that allow the new reader to get the gist of what happened previously. It is also a useful recap for those of us who read the first volume a while ago and want to pick up on the finer plot points.
If you found the first book dark, which I did, then the second book is even darker. It is leavened by moments of humour, but even they are not for the faint hearted. The book is powerful, visceral and never lets up for an instant. It is like being on a massive, dystopian roller coaster, mostly where things go from bad to worst for the protagonist and his team.
It is brutal, bloody and heavy on the violence. There is no let up of pace and you really are committed for the whole thing. My husband read it in a weekend and loved it. I read it afterwards and thanks to the interference of children took longer which made things more disjointed for me. I think I would have enjoyed it more if I had been able to read it as a whole like he did, as it is something you really need to immerse yourself in, the world that Smith creates is so total and very demanding.