I am trying to remember the name of a psychological book that was written about the predictable crises and milestones that people face based on their age, sex, cultural and economic background. The name is on the tip of my tongue, and I can't find it on my bookshelves (figuring if I saw the title I would remember it).

New Passages (look for latest version)

Nevermind. I found it. It was Passages by Gail Sheehy

Yes. It's been revised. "New Passages."

Yes, she rip off the original author (Roger Gould), lost in court.
Paid and then wrote several other books you may be interested in.

GO HERE:
https://en.wikipedia.org/wiki/Gail_Sheehy