Kilmeny of the Orchard by Lucy Maud Montgomery (1874 - 1942)

Eric Marshall is all that a well brought-up young man should be. Handsome, steadfast, and full of ambition, he is expected to expand the Marshall & Company empire -- and to marry a woman suitable to replace his mother in Nova Scotia's finest circles. When a sick friend asks for a favour, becoming a substitute schoolmaster in the Prince Edward Island countryside seems the perfect post-graduation lark. But when Eric wanders into an old orchard at twilight, his life will be changed forever... (Summary by Sarah Jennings)