In my experience, when my kids are like this there's a reason for it. So if you can, by chance, discover this underlying reason and fix it, then good, but most of the time you can't even figure out what it is till after the fact, let alone fix it. So you have to ride it out.
NCSS can work if your baby's issues are habitual, rather than the result of some underlying problem. It certainly won't solve separation anxiety, development 'issues', teething, illness, etc, etc Pantley says as much in the book - if there's other stuff going on, you just have to wait. It still may not work for you anyway of course.

But in general I definitely agree with Nae - if a book gives you grief, give it grief back. Maybe doorstop is kinder than kindling, but anyway