I'm fine with him telling his side of the story and will most likely read the book, but take into account its one side. It's not gospel and forgive me if I'm very wary of him telling the truth with Piers Morgan as his Rottweiler...
I've heard on very good authority, from someone who's seen the fallout of KPs behaviour over the last couple of years post-textgate that the texts were nothing compared to some of the stuff that was going on. Stuff that was truly unforgivable. I've not heard details, but I have heard of the effect he had on some individuals within the team on a personal level.
I think the team's better of without him as the person, certainly not the player. Its a real shame that he hasn't done himself any favours since by becoming a (poor) T20 mercenary. I wish he'd knuckled down to four day cricket more to really embarrass the selectors and their shockingly-poor management of the situation. I get the impression that his high profile appearances at events and closer relationship with Piers Morgan is not the way to go if, as he said last week on twitter, he wants back in to the England team (though that comment elevates him to the position of martyr once the book comes out - its all a finely tuned PR exercise from him). We have to remember that professional sportsmen aren't simply robots who can go out and play on demand without fault. They get elevated to this superhero status when the reality is they suffer the same doubts, insecurities and personal issues that we do. Saying KP should be played and everyone else live with it is simply not an option. In my opinion.
If we're being critical of Paul Newman's dislike and biased writing, don't fall into the same trap of making 'facts' fit personal opinions. I don't think we will hear the whole truth from those directly involved (KP, ECB, Cook, Prior). I tend to view autobiographies as if they were a trial - can the claims be validated by more than the 'witness'? Are his sources credible? Opinions and situations like this make for explosive reading and book sales, but they are only one side of the story. Its not necessarily wholly accurate.