It’s Throwback Thursday! Sixty years ago this month, Sophie’s World by Jostein Gaarder was first published.

One day Sophie comes home from school to find two questions in her mail: “Who are you?” and “Where does the world come from?”

Before she knows it, she is enrolled in a correspondence course with a mysterious philosopher. Thus begins Jostein Gaarder’s unique novel, which is not only a mystery, but also a complete and entertaining history of philosophy.