Giddens Ko (traditional Chinese: 柯景騰; simplified Chinese: 柯景腾; pinyin: Kē Jǐngténg; Pe̍h-ōe-jī: Koa Kéng-thêng; born 25 August 1978) is a Taiwanese novelist and filmmaker. He has published more than 60 books, many of which have been adapted as films. He writes under the pseudonym of "Nine Knives" (九把刀; Jiǔ bǎ dāo; Kiú Pá To). ()