Renowned Italian author Levi, an Auschwitz survivor, finished this contemplation of the Holocaust before his death in 1987. Observing a general loss of understanding about Nazi Germany as time passes and eyewitnesses die, he asks, ``How much of the concentration camp world is dead? . . . What can each of us do so that in this world pregnant with threats at least this threat will be nullified?'' Levi's answer is a thoughtful analysis of the process that was the camps, and his chilling conclusions about the conditions that created them are uncomfortably relevant to current events. Highly recommended. Starr E. Smith, Georgetown Univ. Lib., Washington, D.C.