On Wednesday 29 April the winner of the 2015 Wellcome Book Prize will be announced. In the second of two special editions of Little Atoms, Neil Denny talks to two more shortlisted writers, Henry Marsh and Marion Coutts.

Henry Marsh is one of the UK’s foremost neurosurgeons. He has been the subject of two major documentary films, Your Life in Their Hands and The English Surgeon, which won an Emmy. He was made a CBE in 2010. He is the author of Do No Harm: Life, Death and Brain Surgery, which is shortlisted for the 2015 Wellcome Book Prize.

Marion Coutts is an artist and writer. She wrote the introduction to art critic Tom Lubbock's memoir Until Further Notice, I am Alive, published by Granta in 2012. She is a Lecturer in Fine Art at Goldsmiths College and the author of a memoir, The Iceberg, which was shortlisted for the Samuel Johnson Prize for non-fiction in 2014, and has been shortlisted for the 2015 Wellcome Book Prize.