The main idea of a book is the main point or argument that the author was trying to get across. Since Elijah of Buxton is fiction, the main point is related to the author’s purpose and overall theme. As with most historical fiction, a purpose is teaching about the past, and one of this book’s main ideas is that life was difficult for children of slaves even after they were freed. Even as a free child born in a settlement for former slaves in Buxton, Canada, Elijah has to face the reality of slavery and where he has come from. An overall theme for this book might be: Where you came from is as important as where you are.