Formosa Betrayed is a 1965 book written by George H. Kerr, a US diplomatic officer in Taiwan, who witnessed the February 28 Incident, and the corruption and killings committed by the Kuomintang (KMT, Chinese Nationalist Party) in Taiwan after World War II. The book was originally published in 1965 by Houghton Mifflin. A Chinese-language translation was made in 1974, the English-language version was republished in 1976 by Da Capo Press, a second English-language edition was published by Taiwan Publishing Co. in 1992, and a new Chinese-language translation was released in 2014.