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Retailers can often be set in their ways when it comes to how their products are merchandised. Booksellers organise books by genre and author; bars organise hard liquor by category and provenance.

But some are choosing to thwart consumer expectations by creating new ways of categorising products that encourage discovery and education. Bookstore Libreria in London, for instance, organises its books by themes such as the sky and the sea.

‘This is not about being an on-demand service, and not about serving an instrumental need,’ says Sally Davies, director of Libreria. ‘Instead, this is about providing a space that enables you to get an overview of the intellectual landscape and immerse yourself in the experience of being in the store.’