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'Part whodunnit, part coming of age, this is a gripping debut about the secrets behind every door' RACHEL JOYCE'An utter delight' SARAH WINMAN'A treasure chest of a novel' JULIE COHEN'One of the standout novels of the year' HANNAH BECKERMAN'I didn't want the book to end' CARYS BRAY'An excellent debut' JAMES HANNAH'Grace and Tilly are my new heroes' KATE HAMER'A wonderful debut' JILL MANSELL'A modern classic in the making' SARAH HILARY'A stunning debut' KATIE FFORDE'Phenomenal' MIRANDA DICKINSONEngland,1976.Mrs Creasy is missing and The Avenue is alive with whispers. As the summer shimmers endlessly on, ten-year-olds Grace and Tilly decide to take matters into their own hands.And as the cul-de-sac starts giving up its secrets, the amateur detectives will find much more than they imagined .