“The Course of Reform”, a memoir by Zhao Ziyang, former General Secretary of the Central Committee of the Communist Party of China, was published on May 29, 2009 by New Century Press in Hong Kong. Its English translation, “Prisoner of the State: The Secret Journal of Premier Zhao Ziyang” was published on May 13 before that. According to the book's preface, in 1992, Du Guanzheng, an old subordinate of Zhao Ziyang and former director of the State Press and Publication Administration, together with Xiao Hongda, another former high-ranking CCP official, persuaded Zhao Ziyang, who was under house arrest, to organize his experiences into a book.
Purchase link: https://www.kobo.com/hk/zh/ebook/ZoerWPfG8TiqoXIYwvW2iw.