In this week's Book Club podcast I'm talking to Sarah Ogilvie about the extraordinary story of the making of the Oxford English Dictionary, as told in her new The Dictionary People: The Unsung Heroes Who Created the Oxford English Dictionary. She tells me why the OED was different in kind from any previous English dictionary, how crowdsourcing made it 'the Wikipedia of its day', and how – as she discovered – quite so many cranks, murderers, perverts and foreigners took such an interest in it.