If you are thinking about reading that book, consider the audio book that's read by Werner Herzog himself. I really enjoyed that one, not necessarily because I agree with everything but because I enjoy listening to his voice.

I can no longer hear Werner Herzog’s name without thinking of Sad Beige Clothes for Sad Beige Children.

The article is hard to read, paywall notwithstanding, and tells us very little about Herzog's book other than that the critic didn't like it.

I really appreciate Herzog as an artist. I think Grizzly Man is a unique piece of art, and Herzog's commentary is an integral part of it - original, and very worth listening to.

Tonight I was planning to watch either Fitzcarraldo or Aguirre after having listened to Herzog on the Freakonomics podcast earlier this week. But after hearing about the book there, I was really put off by some of the things he said and concluded that the book would be a hard pass for me. Nothing persuaded me that he had anything interesting to add - neither rationally, nor aesthetically - about a topic which has been extensively covered by very diverse thinkers throughout the millennia.