[2] Together with Kees Prins and Michiel Romeyn, Koch created the long-running absurdist and satiric series Jiskefet (1990–2005; Trash Can) for television, in which he also acted.

[1][2] And he played minor roles in the movies The Flying Liftboy (1998) and Hè, Gezellig (2014; Hey, Cosy), and the TV series The Flying Liftboy (2000) and Voetbalvrouwen (2007; Footballers' Wives).

[4] His sixth novel was Het diner (2009; The Dinner), which was translated into 21 languages including English,[1][5] had sold over one million copies throughout Europe,[6] and won the 2009 NS Audience award (Dutch: NS Publieksprijs).

[11][12] Koch's characters are usually highly disagreeable, distrusting and violent, and they often defend questionable morals and extreme views.

Underlying themes in their narratives include happiness, mediocrity, disgust, the right to live, cynicism, violence, beauty, and the ugly.