Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A tour de force

Grossman brings his many characters to life while documenting the Battle of Stalingrad, at the same time examining the Communist Party and significant events under Stalin. The characters are fighting for survival against the Germans while laboring under a state apparatus that could at any time ruin their and their families' lives. Some of the author's musings on man may seem dated, but, in my experience, such stereotypes are still held by countless people, especially in asia.