During The first 30 pages she just talks about how great and intelligent she is. I have read many books about psychology, none of what she says is useful, the term grit is part of being conscientious, a personality trait of THE BIG FIVE, which is useful know. It also lacks techniques for self improving and needs more detailed examinations on the reflexions of the philosophers and lessons learned. There are many psichology studies to lean on. I have read a good chunk and she doesn't say any techniques for improving. Buy from real psychologists, philosophers, not from a person who has not dedicated enough time or is not specialized on the subject, she is just a researcher. Hope you find this useful.