Tsai Kun-lin (蔡焜霖), a political prisoner during the White Terror era, who was arrested because he joined a book club in the high school. Tsai, 90, was imprisoned on Green Island from 1950 to 1960. After leaving prison, Tsai established Prince Publishing Co. In 1966, he began publishing the semi-monthly magazine Prince. 60 years later, in 2020, Jenyu Peng ( Associate research fellow, Institute of Ethnology, Academia Sinica, Taiwan) is in conversation with Tsai to go through the books he selects for this book club, why freedom of speech matters?