I'll put in my two cents on this one as I can't sit on hands.
She put in writing in that about her marriage, and trashed him to the hilt! He, as a "good" husband with an out-of-control narcissistic wife, said that he did not read it. But you can be sure that he knew exactly what was in that book in my opinion. He said he did not read it perhaps because he did not want to have a confrontation and say
" you stupid b**ch, what the hell are you doing! Everyone knows that is not fiction and why are you trash-talking me" and escalating what she started .
(A la what she did with Jeff right before the murder?)
That, to me, showed he had extreme self-control! I could go on and on about this, but imagine somebody you are married to put your trash and her feelings out in a book so that all your friends and family could see. A one-sided presentation to them.
Him denying that he read it prevented the escalation from back and forth, which perhaps she was asking for and pushing for in my opinion.
He took the high road, as he pretty much had to do often when she tried to push his buttons in my opinion.
* steps off soapbox*