"Peeling the Onion" is a memoir that explores the author's experiences during and after World War II. The author, a Nobel laureate, reveals his involvement with the Waffen SS, a paramilitary organization of the Nazi party, when he was a teenager. The book delves into the author's struggle with guilt and memory, his journey to becoming a writer, and his exploration of how personal and collective memory impact our understanding of history. It is a candid, introspective look at the complexities of identity, morality, and truth.