For all those interested in the process of extermination of European Jews during World War II, the testimony is essential: Shlomo Venezia is one of the few survivors of a Sonderkommando (the Sonderkommando were special commandos responsible primarily for the bodies out of gas chambers and then burned in crematoria) and is thus one of very few able to tell us exactly what was happening. His testimony, which takes the form of a dialogue with Beatrice Prasquier, is obviously extremely hard, but it supplements our knowledge of how necessary. Anyone who has seen the "Holocaust" film by Claude Lanzmann, or read the principal witness Filip Müller ("Three years in an Auschwitz gas chamber," Pygmalion), will find a necessary complement. But note that this book is presented in a very educational way and remains accessible to all (it can also therefore be a route of entry into the discovery of the extermination process): Shlomo Venezia is preceded testimony a beautiful preface by Simone Veil and is followed by two historical notes very simple and clear.