Iain Banks is a talented writer, with very successful scenes, but he keeps his bad stories about life: it's long, it slows down. Here, in addition, we understand nothing, even by the admission of the preface suggesting a second time to read the book from the end (!) To understand something! It's a little crazy to get there I think. In short, I am not reached the end (it seems that there is an exceptional final revelation, but I confess that I do not care less about the characters and the outcome).