Anne of Green Gables recounts the adventures of Anne Shirley, an 11-year-old orphan girl who is mistakenly sent to Matthew and Marilla Cuthbert, a middle-aged brother and sister who had intended to adopt a boy to help them on their farm in Prince Edward Island. The novel recounts how Anne makes her way with the Cuthberts, in school, and within the town. Since publication, Anne of Green Gables has sold more than 50 million copies and has been translated into 20 languages. Written for all ages, it has been considered a children's novel since the mid-twentieth century. It has been adapted as film, made-for-television movies, animated and live-action television series and is taught to students around the world.