To our delight, Ian M. Banks takes us once again into the fascinating world of culture, at least in a world evolving at the margin. (But it hush! It's a surprise ...) With this talent that made him indispensable to SF, he built an intrigue worthy of the best fantasy novels, framed by solid and consistent characters and settings that would have disowned by Cecil B. de Mille. He's like that Banks, he can not do otherwise than good, and that's good. Inversion makes travel far, far away, and sometimes makes you want to come back and not REALLY know the world it depicts. This causes a slight frustration after the last page is turned: why it is so short !! Welcome to a world of Culture ...