The next Gone Girl

Delphine de Vigan has specialised in dark memoirs dealing with her own anorexia and her mother’s suicide. Now, though, she’s written a novel that is a word-of-mouth hit and is being turned into a film. Celia Walden meets the latest literary sensation

Her latest novel, Based on a True Story, is set to propel Delphine de Vigan to new literary heights