The subtitle is "Conversations with Concentration Camp Survivors". I'm not sure that "conversations" is the best way to describe it. I have little doubt that the book was derived mostly from conversations, but the stories told here are more like little autobiographies. There are about thirty of them, and they're told mostly in the subject's own words.
This book is presented in two parts. The first part, about a hundred pages, is background on the subject: the organization of the camps, who was subjugated, a bit about displaced persons camps, reparations, and psychological effects on the victims.
The meat of the book is the second part, where we meet our 30 or so survivors. These autobiographies run five or ten or twenty pages each. They tend to cover the person's whole life: a few paragraphs describing who they were, where they came from, what they did before the camps. Events in the camps are described but not gone into in great detail. The focus of these stories is on what these people did after the camps: how they coped (or failed to cope), their attitudes toward the perpetrators, other victims, and those who had nothing to do with their ordeals.
Some of the people we meet knew each other. Some had encounters with Himmler or Mengele. Some wrote books telling the stories of their time in the camps.
Includes notes, a nice bibliography, an index, and a few maps.