My guest in this week’s Book Club podcast is the poet and novelist Joe Dunthorne, who is here to talk about his new non-fiction book Children of Radium: A Buried Inheritance. In it, he describes how he criss-crossed Europe in search of the truth about his great-grandfather, a Jewish scientist who found himself working on chemical weapons for the Nazis. Joe talks to me about historical guilt, the accidents of fate and human psychology – and making comedy out of tragedy.