Book excerpt: Alice Hoffman is at her magical best in a new novel about loss and healing.When her family is lost in a terrible disaster, 15-yr-old Green is haunted by loss and by the past. Struggling to survive physically and emotionally in a place where nothing seems to grow and ashes are everywhere, Green retreats into the ruined realm of her garden. But in destroying her feelings, she also begins to destroy herself, erasing the girl she'd once been as she inks ravens into her skin. It is only through a series of mysterious encounters -- with a ghostly white dog and a mute boy -- that Green relearns the lessons of love and begins to heal as she tells her own story.