What is the author's tone in Survival in Auschwitz by Primo Levi?

The tone of the autobiography is often cited as its most startling aspect. Levi does not condone, but neither does he strongly condemn his experiences in Auschwitz. He states the obvious—the Holocaust was evil; many, perhaps most, German citizens were complicit in genocide; millions were murdered—but he does not dwell on these aspects of his experience. Instead, the narrative is informed by Levi's genuine interest in the processes he experienced.