This week, Nicola Shulman is staggered by Sarah Vine's account of Westminster rivalry; and James Clackson on the irresistible rise of Indo-European.

'How not to be a political wife: A memoir', by Sarah Vine

'Proto: How one language went global', by Laura Spinney

'The Indo-Europeans rediscovered: How a scientific revolution is rewriting their story', by JP Mallory

Produced by Charlotte Pardy

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