Author of one of the first English language novels written in Thailand, Sudham first heard English spoken as a child when a missionary visited his village in north east Thailand. He was educated at a village primary school and a state school in Bangkok, attending Chulalongkorn University, and won a scholarship to Victoria University, New Zealand. He later did Honours at the University of Sydney in the early 1970s, and at night he wrote his first novel, Monsoon Country, and short stories and poems. From 1975 to 1978 he studied in England before returning to Thailand. He revisited Australia in the 1990s.
Having grown up under the repressive regimes of the 1960s and 1970s in Thailand, Sudham writes as the international voice of the Lao-speaking rural poor of Thailand..