Pulitzer Prize winning novelist Michael Chabon joins Matthew Sweet to discuss his new book Telegraph Avenue and to reflect on the joys and perils of nostalgia. Joanna van Heyningen, a judge for the RIBA Stirling Prize, explains why Stanton Williams’ Sainsbury Laboratory was granted this year's award. Novelist A.S. Byatt and Alexandra Harris, Lecturer in English at the University of Liverpool, argue for the Ash tree’s importance in our mythical and physical landscape. And Nicholas Roe discusses his new biography of celebrated romantic poet John Keats.