I am not hating on the book - if you were running a lifestyle, non-YC company I don't think it would be an issue, but PG & other YC partners are famous for wanting all founders to focus on just their company.
I can't see how they wouldn't think that this could be a distraction - or am I missing something here?
Again...more power to you for writing, and I am not trying to be mean....it just seems that this is either very ballsy of you (to go against what seems like one of the tenets of YC in such a brazen manner) or a hedge against bad news for the company.