Adam talks to David Bellos, Professor of French Literature at Princeton, about his new book 'The Novel of the Century: The Extraordinary Adventure of Les Miserables'.

Speaking at the Guernsey Literary Festival, David explains how Victor Hugo came to write his most famous work, what kind of reception it got at the time, and why he wouldn't want to live in Hugo's house in Guernsey.

Adam talks to writer, broadcaster and all-round science guy Simon Singh.

Speaking at the Guernsey Literary Festival, Simon discusses his book 'The Code Book', and in particular the history of the Enigma machine, which the Germans used to encrypt their communications during World War II, and which was famously broken by Alan Turing and co at Bletchley Park.

How did Enigma work? How was it broken? And why did the story remain secret for decades?