This is what we found on Wikipedia regarding the Irvine Welsh's PORNO:

Irvine Welsh (born 27 September 1958) is a Scottish novelist, short story writer, screenwriter and filmmaker. His novels and short stories, which almost always take place in his native Scotland, are known for their gritty depictions of working-class life and its intricacies; particularly drug addiction, social alienation, lack of opportunity and boredom, amongst others.

Welsh is best known for his 1993 debut novel Trainspotting, which was adapted into a film of the same name; both were highly acclaimed and have become cult classics in their respective mediums. The novel was ranked 7th in a 2016 public poll of the best Scottish novels of all time, while its film adaptation was named the best Scottish film of all time in an equivalent 2004 poll.

In addition to his novels, Welsh has written plays and screenplays, and directed several short films. As of 2025, his written works have sold six million copies worldwide.