The lure of conspiracy theories, the power of fiction to translate history and the public role of writer are debated as Shahidha Bari chairs a discussion recorded with the Colombian writer Juan Gabriel Vásquez, the Spanish writer Javier Cercas and the Turkish author Elif Shafak - recorded with an audience at the Hay Festival.

Javier Cercas' latest novel is The Impostor and his essay about fiction is called The Blind Spot.

Juan Gabriel Vásquez’s new novel is called The Shape of the Ruins.

Elif Shafak is the author of novels including The Architect's Apprentice, Honour and Three Daughters of Eve.

Producer: Fiona McLean.