Van der Merwe only started writing in his early forties. In 2004 he published his first short story,
The Water Mountains, in a UK short story collection. In 2007 he published his debut novels, ''No Man's Land
and Nasleep
, written by him in English and Afrikaans respectively. No Man's Land
was shortlisted for the Commonwealth Prize as well as the M-Net Literary Awards, and Nasleep'' for the UJ Literary Prize. Van der Merwe also wrote his next novel in English and Afrikaans, and
Shark and
Geldwolf were published in 2009.
Geldwolf was shortlisted for the
M-Net Literary Awards (film category), and awarded the
Eugène Marais Prize by the South African Academy for Arts and Science. In 2012 his third novel was published, once again written by him English and Afrikaans, as
Shadow and
Skaduwee respectively. In 2015 he published
Donker Stroom - Eugène Marais en die Anglo-Boereoorlog, a biography of the famous South African poet and naturalist
Eugène Marais. It was awarded the KykNET-Rapport Prize (non-fiction), as well as the Protea Boekhuis Prize and the L.W. Hiemstra Prize by the South African Academy for Arts and Sciences. It was also short-listed for the
South African Literary Awards (non-fiction) award. In 2019 Van der Merwe published
Kansvatter: Die rustelose lewe van Ben Viljoen, a biography of
Ben Viljoen, an enigmatic Boer War general. It was awarded the KykNET-Rapport Book prize (non-fiction), the
ATKV Book prize (non-fiction), as well as the Protea Boekhuis Prize by the South African Academy for Arts and Sciences. It was also shortlisted for the South African Literary Awards (non-fiction) award. ==Works==