They come from some of the many oral histories currently on the market. Its hard to say when it all started, but oral histories have become hot products of late. Take for example the special issue of the journal Oral History on the February 28 incident produced by the Academia Sinica. Released in February of 1992, by November all 2000 copies had sold out.
曾幾何時，口述歷史成為坊間書市的搶手書刊，以中央研究院在民國八十一年出版的「口述歷史」期刊﹘﹘二二八專號為例，二月出版，到十一月中旬，兩千冊期刊已銷售一空。