The book could be seen has the deleted scenes of the martian trilogy. In this way it is quite interesting since it sheds light on several aspects that had been left in the shade. We are pleased to meet again the main characters and to share new parts of their martian life. Altogether it allows to get a better understanding of the trilogy. Some chapters are very fascinating, such as for instance the ascent of the martian highest mountain, and as always KM Robinson's style is very pleasant. However the book lacks of continuity and it may be rather puzzling, even disappointing, for those readers who seek for a whole story, with a beginning and a proper ending.