Two classic stories, The Children of Green Knowe and The River at Green Knowe collected in one volume. 'What if my great-grandmother is a witch?' thought Tolly. Tolly's great-grandmother wasn't a witch, but both she and her old house Green Knowe were full of a very special kind of magic. And Green Knowe turned out not to be the lonely place Tolly had imagined. There were other children li…