Harriett Gilbert and her guests - columnist and author, Michele Hanson and Director of External Affairs at the Science Museum Group, Roger Highfield - discuss their favourite books by Tobias Smollett, Siddhartha Mukherjee and John Le Carre.

Michele Hanson's choice: 'Humphry Clinker' by Tobias Smollett

Roger Highfield's choice: 'The Emperor of All Maladies' by Siddhartha Mukherjee

Harriett Gilbert's choice: 'A Murder of Quality' by John le Carré

First broadcast on Radio 4 in June 2012.