James Dewitt Yancey – also known as J Dilla — was a hip hop super-producer and pioneering beat-maker. J Dilla died at just 32 years old, and worked right up until the end, making music and creating beats from his hospital bed. His mother was there for every bit of it.

British writer Martin Amis is 68 years old. He’s written 14 novels, hundreds of essays, memoirs, even a screen play. But he has strong feelings about writers who work past their prime. So he feels the clock ticking — is it time to pack it in? When will he know?