I tend to fall in the "disappointed" set about this one. It is short, but 1/3 into it I realized that the author is basically rephrasing the same concepts over

I tend to fall in the "disappointed" set about this one. It is short, but 1/3 into it I realized that the author is basically rephrasing the same concepts over and over and over. Does it changes abruptly after the second half? I'll probably never know.