Brian Greene covers a lot of ground in this book, literally beginning to end. He does a wonderful job of bringing together the leading discoveries and theories of time, space, life, language, meaning and belief. If anything, the book is too broad. As a result there is some incongruity among the various chapters and the reading bogs down a bit toward the middle. Nonetheless, I'm very glad I read the book. He brings us the possibilities and probabilities of the far far future - until the end of time.