Sometimes books for sharing need to be calm and gentle, soporific even, to lure little ones under the duvet and off to sleep. And sometimes books need to be utterly zany, full of bright colours, daft doodle-style illustrations and crazy rhymes for the child to shout out loud. Please, dear parent, do not try to read this wonderful book to your offspring within an hour or two of lights out. Seriously, be warned - You Will Regret It.