 Highly controversial in its day, the narrative structure is of small separate events without obvious links, but differs from his fiction writing only in its claim to be historically and autobiographically true.Later critics point out that fiction-reality boundaries elide in several of his books and 'OOP' presents some fictional elements as reality.Voted Best Norwegian Non-Fiction Book published after 1945 in the Culture and Entertainment category in the NRK program "Faktasjekken", by Members of the Norwegian Professional Literary Authors and Translators Association.