MAO, THE UNKNOWN STORY, by Jung Chang and Jon Halliday. Jonathan Cape, 2005, 814 pp., £25 (cloth).

It is savagely ironic that just when China is viciously attacking Japan for trying to rewrite its history, here is a book that claims that the whole official history of the revered founding father of Communist China is a myth written to cover up the evil of a monster.

The authors, Jung Chang, who wrote the best-selling "Wild Swans," and her husband Jon Halliday, estimate that Mao Tse-tung (Mao Zedong) was responsible for killing 70 million of his own people in his determination to enforce his rule over China. This is far more than Adolf Hitler or Josef Stalin, who are widely recognized as evil dictators. Yet Mao's portrait still has pride of place overlooking Tiananmen Square at the entrance to the historic Forbidden City, seat of power of Chinese emperors.

This is a nuclear weapon of a book: It devastates the reputation of Mao and most of his henchmen, and raises questions about the legitimacy of the ruling Communist Party. Among the authors' claims: