This book provides an important philosophical additional lighting. Brian Green does not take part, it explains very clearly the physical and philosophical, the impacts of discoveries, presenting different schools of thought on the matter.
Whenever a sensitive subject, complex, is discussed, for example "the relevance of the reality," the illusion of "time", it uses different metaphors, suitably adapted, which greatly assist in understanding of these concepts our brain refuses a priori.
I am 6 or 7th reading this book once a year on average I refreshed the neurons that tend to bind to the daily experience, this book is absolutely indispensable to those who can put their convictions into question . Again, it is an exceptional pedagogy, Brian Green had the happy audacity to address very complex issues here exhaustively, and managed.