I have strong disagreements with this book. There are some bits to take for me from the interviews she writes about, but I strongly disagree on her last chapter 'Do the failure principles really work?' which is only partly about this question and mostly an in depth and in detail description of her late miscarriage - trigger warning for this part of the book - and how she applied her formula of failing after this. You are not "failing" at getting or staying pregnant. You didn't study enough, you failed the exam. You didn't train enough and failed to finish the marathon. You didn't promote your book enough and failed to make the sales numbers. But you didn't fail at anything, if you miscarry. She claimed her doctor had dangerous language discribing a miscarriage as 'like a heavy period' but I'm more afraid she might teach women that their feeling of being a failure is validated because they are failures. I almost couldn't finish the conclusion because this was so disturbing for me. -- roughly 80 pages, because of graphics and quote pages almost every second page.