Brain Greene gives the laymen the opportunity to glimpse into the latest physics developments. His explanations are clear, although I sometimes wonder why rudimentary explanations like the one on logarithms are required when every person who has an interest in such topics will not come completely devoid of any mathematics background. Also the undeniable passion in the authors and readers voice make the subject sometimes less believable as would have been by a professional neutral reader.
In spite of this minor critique, I really enjoyed the continued journey through string theory, the inflaton field and the many versions of the multiverse. A part from these insights, one phrase will certainly remain on my mind for the years to come: "we have to take the mathematical models more seriously". There is indeed many arguments to be made that the mathematical equations deliver more than their original use and that the results we seek in an equation could indeed come entangled with results we will observe in later experiments. Maybe I will need to read a third book by Brian Greene to convince me that the entanglement of results comprises all results of reality. A sort of: mathematics as the quantum theory of the physical reality. Sounds crazy, but all predictions turn out to be true.