"Grace and Amelia looked at the gravestone propped up against a tree, its surface tinged green with age and moss. Grace had already scraped away accumulated dirt and grime to reveal a crudely chiselled out initial, name and date. With a sinking feeling in her stomach, Amelia read the inscription." Present day: When their parents died, Amelia and Grace Farrell believed they had no other family. Then out of the blue a letter arrives informing them they...