One is immediately stuck ...

The first part of the book is a shock, it is propelled into the head of Utoya killer, we feel his rage, his growing dementia but also his doubts, his fears throughout his bloody and terrifying journey.
The second part of the book back on the construction of the ideology of Anders Breivik is a little less "punchi" but worrying because everything holds his chaotic youth, his morbid narcissism and a certain propensity to violence. Accented by a national and European policy on migration flows incomprehensible by many citizens abandoned by their successive governments.
The author makes us a beautiful demonstration of research and investigation based and revealing many parts of the investigation.
But not to put all hands, fragile minds might be tempted.