Can you trust the advice of an author - particularly in the context of love/life choices - who will readily spout unresearched, biased, and cut-to-fit views when a major news corporation comes calling for a quotable?
This book is as bad as the self help books for men that claim nice guys can't succeed in relationships. It's just as sexist, just as wrong, and just as negative.
Consider: are people more likely to be manipulated into bad behaviour by a pop psychology book which promotes immoral behaviour as a lifestyle choice in order to achieve a desirable goal, or an entertainment that is deliberately facile, shallow, and probably not even that good*?
The influence of media on abuse of any kind can't be attributed "in large part" to any one source, but I think the insidious influence of texts like these can be harder to detect and harder to rectify.
*I'm sure you all know what I'm on about.