Scottish author Douglas Stuart's Shuggie Bain on November 19 evening named the winner of the 50,000 pounds 2020 Booker Prize for Fiction.

"Shuggie Bain is destined to be a classic - a moving, immersive and nuanced portrait of a tight-knit social world, its people and its values," reported news agency IANS quoting Jury Chair Margaret Busby.

Busby said this while naming Stuart the winner from among the six authors, among them Indian-origin writer Avni Doshi, who had been shortlisted for the Prize, which is awarded to the best original novel in English published in the UK and Ireland in the previous year.

"Gracefully and powerfully written, this is a novel that has impact because of its many emotional registers and its compassionately realised characters," Busby added.

"The poetry in Douglas Stuart's descriptions and the precision of his observations stand out: nothing is wasted," Busby added.

In an interview with BBC, the 44-year-old Scottish author said that he was "absolutely stunned" to win the prize.

Dedicating the book and his prize to his mother, who died of alcoholism when he was 16, he said the book was "a love story looking at that unconditional, often tested love that children can have for flawed parents".

"I'm sorry if I make it sound like a bleak book, it's actually very funny, it's tender and there's a lot of intimacy and love," he said.

"I think that's the Glaswegian spirit. Growing up in Glasgow was, I think, probably one of the greatest inspirations of my life," he added.

The novel, set in the Thatcherite Glasgow of the 1980s, follows the life of Agnes Bain, who is descending into despair and struggling with alcohol after the breakdown of her marriage.

The six books on the shortlist for the 2020 Booker Prize were:

The New Wilderness by Diana Cook (Oneworld Publications)

This Mournable Body by Tsitsi Dangarembga (Faber & Faber)

Burnt Sugar by Avni Doshi (Hamish Hamilton, Penguin Random House)

The Shadow King by Maaza Mengiste (Canongate Books)

Shuggie Bain by Douglas Stuart (Picador, Pan Macmillan)

Real Life by Brandon Taylor (Originals, Daunt Books Publishing)

Shuggie Bain is Stuart's first novel.

After graduating from the Royal College of Art, he moved to New York to start a career in fashion design, working for brands including Calvin Klein, Ralph Lauren and Gap.

He started writing in his spare time a decade ago. His work has since appeared in LitHub and in The New Yorker, which has published two of his short stories this year.

Stuart said in an interview for The Booker Prize website that the 1994 Booker winner "How Late It Was, How Late" by James Kelman changed his life because it was one of the first times he had seen his people and dialect on the page. He is currently finishing his second novel, "Loch Awe", also set in Glasgow.

The Booker Prize podcast series will be releasing a winner podcast, featuring an interview with Douglas Stuart, available from November 25.