Trespass, Rose Tremain (Vintage Books)

by Patrick O'Connor

IN the Cevennes region of France, 10 year old Melodie skips away from her school picnic to explore.

To her delight she comes across a 'deep, sea-green pool' and strips down to her knickers to prepare to dive in when 'at the very corner of her vision, she sees something which shouldn't be there...then she starts screaming.'