Well Wagner was actually an extremely prolific writer so his views on politics and music were very well known. then it's fair commentary when reviewing the books, but not so much when reviewing the operas (unless they happen to be full of aryan mythology). it was presented as being written by him. he's a smart guy, so i can believe it. there were lots of intrusive chapters from his partner, the money guy, who seems very full of himself. i imagine it was a bear to edit. most chef books that involve food are ghost-written. many "memoirs" are as well. that's a given in this category. i have friends who make most of their livings doing that.