This book starts out a bit slowly but really picks up a few chapters in. If you're willing to bear with the slow pace at the beginning, it will pay off.
Having not been born in the late 70s, my only experience with the "hippie" movement of the 60s is what I've read or seen on tv. Part 2 of the book really captured my interest as it dealt with the past (part 2 of the books takes place in the 60s). I found reading/learning about that era to be fascinating.
My only real complaint with this book (and nobody else may feel this way) is that I felt Part 2 should have been before Part 1. I'm not going to give away any spoilers but some major events happen in Part 1 that I just didn't really care about at the time of reading them because I wasn't invested in the characters. After reading Part 2, I found myself wanted to read Part 1 again because now I cared about some of the things that had happened.
I have a few more issues with how some of the characters interacted but again I don't want to spoil anything for anyone. I'll just say that for story development the interactions made sense but I felt like it was too contrived.
Overall I would say this book is worth a read. It will entertain you and educate you to a time you may or may not be familiar with.