It's really a nice book and it left me feeling very optimistic about the future. The audio book has superb quality as well if you prefer that. Regarding rereading, maybe the chapter about the multiverse is dense and require rereading, the rest was OK.
Amazing book. It's an extension of his earlier 'The Fabric of Reality'. There he makes the astonishing unambiguous claim (chapter 2) that 'Single particle interference experiments show us that the multiverse exists and that it contains many counterparts of each particle in the tangible universe'. No ifs or buts! I've been looking for an informed critique/discussion of this without success though it's easy to find plenty of general objections raised to the multiverse concept (Everett's 'many worlds') / interpretation of quantum physics. I guess I haven't looked hard enough.