Giddens Ko

In October 2014, Ko admitted cheating his girlfriend of nine years, Hsiao-nei, with television reporter Chou Ting-yu. In early May 2015, Ko confirmed that his relationship with Hsiao-nei had ended. Ko and Chou began dating in March 2016; they married in late 2017. On 4 April 2020, Ko announced the birth of their first child, a girl.

In 2017, Ko directed the high school horror-comedy film Mon Mon Mon Monsters. Ko originally intended for the film to be a mockumentary shot entirely on iPhone. This idea, however, was eventually disregarded as the project evolved into a more personal work inspired in part by the negative publicity the director was receiving at the time for his affair with Chou.

In October 2014 it was reported that Beijing had ordered works by Ko removed from shelves. A few weeks previously, Ko had shaved his head to show solidarity for Occupy Central with Love and Peace, the organization that started the 2014 Hong Kong protests.

In 2012, Ko notified Apple Inc. that some approved applications on the company's iOS platform were accessing pirated versions of his books. Apple initially refused to pull the apps, as the company was unsure about Ko's publisher having proper authorization to contact them. Ko traveled to Hong Kong to file a complaint in person before the matter was resolved with the removal of the apps. On 9 October 2012, Ko was chosen as one of "Ten Outstanding Young People of Taiwan" by the Junior Chamber International Taiwan.

In 2008, Ko directed the film L-O-V-E [zh] , along with Vincent Fang, Chen Yi-xian and Huang Zijiao. In 2010, Ko directed the film You Are the Apple of My Eye, based off his book The Girl We Chased Together in Those Years. In 2011, Ko adapted his "Killer" series into the film The Killer Who Never Kills. He produced a documentary focusing on Taiwan's animal shelters in 2012, titled Twelve Nights. In 2014, another of Ko's books was adapted into the film Café. Waiting. Love. The film adaptation of another of Ko's books, Kung Fu, was originally set to be released in 2014, but its release date was pushed back to 2015. In September 2015, Ko announced another book–to–film adaption, The Tenants Downstairs, was to be released in 2016.

He started writing fiction in 1999, and posted most of his first works on the Internet. Ko struggled through the first five years of his writing career, before branching out into multiple genres, namely horror, science fiction, and romance. He writes 5000 words daily, and at his peak writing pace published one book per month for 14 consecutive months. This set of work helped Ko's popularity rise in Taiwan. Ko has compared himself favorably to Louis Cha, Gu Long, and Ni Kuang.

Giddens Ko (simplified Chinese: 柯景腾 ; traditional Chinese: 柯景騰 ; pinyin: Kē Jǐngténg ; born 25 August 1978) is a Taiwanese novelist and filmmaker. He earned his Bachelor of Science in Management from National Chiao Tung University and Master of Social Science from Tunghai University. He has published more than 60 books, many of which have been adapted as films. He writes under the pseudonym of "Jiubadao" (九把刀), which literally means "nine knives".

Born on 25 August 1978 in Changhua County, Taiwan, Ko grew up as the second of three sons in Changhua, where his parents own a pharmacy. Ko discovered his love of writing when he penned a story as part of his university application.