This week, novelist Francis Spufford explains why the Blitz proved fertile territory for fantasy and the occult; and Darra Goldstein on the hidden properties of kimchi and sourdough. 

'Nonesuch', by Francis Spufford

'Adventures in Fermentation: From ancient origins to culinary frontiers, an exploration of the microbes that shape the world we live in', by Johnny Drain

'Ferment: The life-changing power of microbes', by Tim Spector

Produced by Charlotte Pardy

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