I was tempted for a while by this book, and I was not disappointed with the story! We discover little by little all the mysteries and secrets related to life in this curious silo ... The characters are endearing, even if it was hard to see some characters disappear so quickly in the early history .. . In fact, it is rare for a trilogy, but after reading the first volume, I think that the author could further lengthen the story, to prolong the mysteries and develop certain aspects or flown characters. But I really hooked, and I look forward to the pocket out of the following two volumes!