I took great pleasure in advance in the adaptation of the inhabitants of this building facing a power outage throughout the country. And if it happened? What are the consequences on our small modern comfort? How would we react to the riots, insecurity, looting the threats, the risks of famine, ignorance of the extent of the outage and its duration, the loss of all our modern benchmarks? The style is pleasant, well-drawn characters. Ordinary people, of varied horizon and many prejudices apart, which become reluctant heroes, embedded in a sudden and destabilizing history. We follow with interest the development of their character in response to the deterioration of external conditions and ambient anxiety. It projects into their survival reactions, we understand their discomfort and their failures, we salute their adaptability and ultimately their human solidarity. A very good read that makes us regret that the book is not even bigger.