'Chilling.' Vogue'As unusual as it is alluring.' Elle'Delightfully disturbing.' Refinery 29'Very powerful.' Sayaka Murata'Disquieting.' Paula Hawkins'You will be obsessed.' Leila SlimaniThe Woman in the Purple Skirt is being watched.

'Go Grandma Elvira!' Margaret Atwood

'Wickedly funny and fearlessly honest.' The New Yorker

'Glorious.' Sarah Moss

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You are a small thing, and you must learn to fight.

Swiv has taken this advice too literally. Now she's suspended from school, in the care of her foul-mouthed, hilarious grandmother.

Mom is busy being pregnant, so Grandma gives Swiv a very different education. Swiv learns maths with Amish jigsaws and How to Dig a Winter Grave. Grandma's methods may be unorthodox, but...