content: I am actually borrowing this book from a friend. But the way things look, I will need a copy for myself. I love reading fiction, and have often found non-fiction books boring and lose interest in them. However, once I started reading this book I was hooked, I would rather read QED than that excellent Stephen Baxter book sitting on my bookshelf. Feynman lets the reader understand the many aspects of the concept before moving on, and then he develops the concept to introduce his next point. I am more interested in quantum mechanics than ever before. I highly recommend this title!