Mao — The Unknown Story by Jung Chang and Jon Halliday. This one looks like it will be a good read.
Among the many revelations, Mao — The Unknown Story depicts and documents Chairman Mao as the brutal monster he really was; how Mao desolated his own country and exterminated his own people, party cadres and impoverished peasants alike, even whole Red Army regiments. Mao committed in his blind rage whatever crimes were necessary to attain and preserve supreme political power. "Democracy," "justice," "equality," " fraternity," "freedom" were just words to be used for propaganda purposes, not ideals to be pursued by Chinese communists.