This is an interesting discussion. I haven't read either book, but I have read many, many, many peer reviewed studies that have clearly shown how certain factors (race, gender, sexual orientation, etc.) have a HUGE impact on the ability of an individual to get a job, and thus get ahead. There was a classic Princeton study where clean cut male students were sent out, all dressed the same, to apply to HS graduate level jobs. Things like working in restaurants or at mall stores were sought, and they filled out applications with the store manager as one would for those jobs. The rate of job offers for blacks and whites was not equal until the white applicants had a fictional FELONY CONVICTION listed on their applications. Then it was EQUAL. A more recent study in the Proceedings of the National Academy of Science had researchers sending an identical resume (the only difference was that one had "John" as the applicant name and the other with "Jennifer") to professors in academia for feedback. Each professor received only one resume: either John or Jennifer. Among other findings, based upon the professors looking at the same applicant with just different names, John was rated as significantly more competent and was given a hypothetical starting that was about 10% higher. The professors had no idea this was for a study; they were duped into showing their true bias. Another one I read recently that wasn't so scientific was a lady, say her name was Shaniqua Black (that's not really her name as I can't remember it, but it was something like that) who decided to always apply to the same jobs twice: once with her real name and again with identical qualifications but the name Bianca White. This was for white color jobs through online services such as monster.com. Bianca got tons of call backs; Shaniqua got nearly none.
There are literally hundreds, possibly even thousands, of these types of studies. So, when folks say maybe there is bias against some people in getting a decent job or maybe there is a pay gap, it just makes me roll my eyes. And if you are about to say "But I would not do that myself, because I am not a racist," then please read Racism without Racists by Eduardo Bonilla Silva and very carefully consider how you have lived your life before you chime in. By the way, I am white, fair, tall, decent looking, extremely highly educated, and with extremely highly educated parents. So this isn't crying "Oh poor me!" it's just putting $0.02 of reality into this discussion with my fair stubble.
My experience has been that people want to give me a job as soon as I walk through the door, unless they are expecting a man. Hilariously I have a man's name, so this "oh gee I wasn't expecting you" world's shortest interview has happened more than once, and the look on the hiring manager's face has been priceless when I walk in and he realizes I'm female applying for a job for which he absolutely will NOT hire a female (foreman at a factory type jobs and military jobs are when this has happened; not saying there are never women hired into these positions, but I'm sure me being female absolutely was a surprise and that the hiring manager immediately withdrew me from consideration in some of these jobs.) I really wish I could have captured this interviews on candid camera. Ah well, it all worked out in the end, as I now have a great job.