A page-turning novel that is also an exploration of the great philosophical concepts of Western thought, Jostein Gaarder's Sophie's World has fired the imagination of readers all over the world, with more than twenty million copies in print.

One day fourteen-year-old Sophie Amundsen comes home from school to find in her mailbox two notes, with one question on each: "Who are you?" and "Where does the world come from?" From that irresistible beginning, Sophie becomes obsessed with questions that take her far beyond what she knows of her Norwegian village. Through those letters, she enrolls in a kind of correspondence course, covering Socrates to Sartre, with a mysterious philosopher, while receiving letters addressed to another girl. Who is Hilde? And why does her mail keep turning up? To unravel this riddle, Sophie must use the philosophy she is learning―but the truth turns out to be far more complicated than she could have imagined.

Fifty years ago a girl disappeared from her home in Norway. She ran after a lamb and found herself travelling right across Europe to Palestine, and back through 2000 years to meet the Holy Family in Bethlehem. There she met angels, shepherds, wise men and other biblical characters who joined her on her pilgrimage; and she heard of many of the things that happened in the world in the last 2000 years. In present-day Norway, a boy acquires a strange old Advent calendar. Hidden in each of the windows is a tiny piece of paper. Little by little these pieces unfold the girl's story and as we learn what happened to her, another story is revealed - that of the strange old man who made the calender.