Jonathan Franzen aghast at destructive social media
The US novelist Jonathan Franzen exploded into public consciousness with his book The Corrections.
He also achieved critical acclaim with Freedom - both books focus on the anxieties and preoccupations of modern America.
Franzen is also an essayist and social commentator who famously disparaged the internet and was thus described as a luddite.
He spoke to Newsnight's Kirsty Wark about his new novel Purity.