Hong Kong-Swedish writer detained by China in 2015
Gui Minhai (Chinese: 桂民海; pinyin: Guì Mínhǎi, formerly 桂敏海; Guì Mǐnhǎi; born 5 May 1964), also known as Michael Gui, is a Hong Kong-Swedish book publisher and writer. He is an author of many books related to Chinese politics and Chinese political figures; Gui authored around 200 books during his ten-year career under the pen-name Ah Hai (阿海) and is one of three shareholders of Causeway Bay Books in Hong Kong. Gui went missing in Thailand in late 2015, one of five men who vanished in a string of incidents known as the Causeway Bay Books disappearances.
https://en.wikipedia.org/wiki/Gui_Minhai