Wow! I loved this! Absolutely unique, unlike any book I have ever read before; this is an impressive feature which I really appreciate in books. I recommend Sophie's World to anyone looking for an introduction to philosophy. This was my first contact with the history of philosophy and I thought it was absolutely perfect for me. I was lucky enough to be traveling in Greece and exploring the Acropolis and Greek culture firsthand, nice timing for reading about Greek philosophers. 
 This book is written in the form of a novel with a protagonist and a plot that ties all the philosophy "lessons" together. The storyline was riveting-- I had no idea what would happen next. The lessons were broken up into appropriate lengths and overall gave a very nice view of the big picture, not getting bogged down in too many details. It was easy to read; the challenge is left to the reader as to how much to ponder and contemplate the meaning of life. I loved this book from beginning to end, and I strongly recommend it!