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

If you happen to agree with me that Leo Tolstoy was one of the ten most creative bipeds (Perhaps THE most brilliant creative genius , even a notch above Shakespeare !) then you would would want to read this superb bio of the master,Reading Troyat account of Tolstoy's life is like being a fly on the wall of the Tolstoy estate at Yasnaya Polyana _____ Troyat has cast a wide net and scooped up a real gem of a book .