I went through what could only be considered a 'disastrous' time in my life in 1987.
I looked into those books, and yes they gave some help....but it really felt quite empty (for me).
I can only talk about my personal experience here, but life for me seem to have no 'good-outcome'.
I had read about ever self help (new-book) on the market, and nothing worked.
But then I picked up one book, and read it (in it's second part)....I then knew I had found help, big time....It's the biggest seller of all time too.