It's a book that catches your attention in the first page you read, whether you are into angels or just looking for a good book for the summer, this is where you should go to.
The character development is on point and it makes you sympathize with the protagonist since minute one, also it shows us how a world war against angels would be like and it slowly shows you the reasons why the war started.
It was a truly enjoyable experience to read the trilogy and I'd easily recommend this book to either novice readers or experienced ones.