The reviews on Amazon are interesting. I'd probably enjoy browsing it, but I don't think I could stomach spending money to read it.
The thing that grates on me is that it is supposed to challenge widely held assumptions and parenting precepts.
Maybe they are widely held, but I don't hold all those beliefs: I don't need a book to tell me that praise can be terribly overdone, that helicopter parenting makes kids less capable and less safe, or that teenagers need more sleep.
Some of us parents do in fact have common sense .