The novel is a wonderfully commodious creature. One might wish they made trousers like it, for it can stretch or shrink to accommodate almost anything, from Ali Smith’s Spring (part story, part polemic) to Max Porter’s prose-poem/fable, Lanny. Then there’s the current vogue for re-tellings: Margaret Atwood’s version of The Tempest and Pat Barker’s feminist look at the Iliad.