When you read any wrestler's biography a good thing to do is decide whether it is kayfabe or legitimate. Kayfabe, according to Wikipedia, and in this case, it is correct, "is the portrayal of staged events within the industry as 'real' or 'true,' specifically the portrayal of competition, rivalries, and relationships between participants as being genuine and not of a staged or pre-determined nature of any kind. Kayfabe has also evolved to become a code word of sorts for maintaining this "reality" within the direct or indirect presence of the general public."
Basically "kayfabe" is acting. I am not one to disparage wrestlers because they don't legitimately hate one another or try to cause actual bodily harm to one another any more than I blame Mark Harmon for not being a real NCIS agent. Wrestlers are actors who do their own stunts. The term "sports entertainment" is a good one. Arn's book, is a little of both. It is kayfabe in that it purports to the reason for the matches, etc. but it is also legit because it gives a lot of factual background. Anderson came from the era of strict kayfabe and the book was written before the fourth wall was torn down to a greater degree. But one who knows this will be able to enjoy the book as much, if not more, than the person still in the dark.
I am old enough to remember the days he speaks of in his early career and of course I know him now. The book was written before WCW went out of business but gives a good auto-biography of the man that many called "The Enforcer" of the Four Horsemen.