On the Edge tells the story of Emerald Lake Visser, an unhappy fourteen-year-old who came to live on her aunt and uncle's farm when she was orphaned at age five. A misfit in her community and at school, her only real friend is an elderly woman, Jess, who teaches her to sail. Emma's a natural sailor, as if she's been on a sailboat her whole life. When Jess dies, it's revealed that she was Emma's grandmother. After receiving a letter that...