Yen Yun-Nung graduated from National Chengchi University. To My Sister is his first novel, although he previously published a novelised version of the 2011 blockbuster Seediq Bale, Taiwan’s most expensive film production. As well as writing novels, Yen works as a music producer and has written lyrics to over three hundred popular songs. The theme song to the 2008 hit film Cape No. 7, for which he wrote the words, won the Forty-fifth Golden Horse for best original song.