Stephen King described Sarah Pinborough’s psychological thriller Behind Her Eyes as ‘bloody brilliant’. Netflix snapped it up and made it into a hugely successful six-part series in record time

The ending - #wtfthatending - trended on social media and the book, like many of Sarah’s others, shot to the top of best-sellers lists all over the world.

Sarah talks us through what happened, how her mum fell asleep when it aired, how the ending of all her books has to be written first, and teases her new thriller Insomnia which is also being adapted for TV.