This book was apparently first published in the nation around 1965. As you progress through the book, you learn that the author spent a year living with the Hells Angels in California. Other than my desire to know something about this author and my fixation on the 1960s as a true baby boomer, I would not usually be attracted to a book about any motorcycle gang, especially the Hells Angels. I'm sure this is another example of a book that I probably wouldn't have completed if I had to read it in print. Listening to the audible version made it more interesting and helped me get to the end.
If you want to know for sure what the author thought about the Hells Angels, you have to wait until the last part of the book where he tries to be honest about what he really thinks of these people he spent a year with. In summary, it's complicated! The stories are interesting but repetitive. The line between fact and fiction is somewhat blurred. For example, the discussion of what might constitute rape has a bit of a 1950s feel that hasn't aged well since it was written. Or maybe the author was just trying to say what he thought the Hells Angels might say if they thought it was important enough to explain what they thought. But as the author makes clear towards the end of the book, he saw them as mostly a follow-the-leader crowd rather than individually thoughtful.
The writing has a certain style, and I suppose I can say that I'm glad I've now experienced it. And this experience will go wherever these kinds of books go when you can't quite figure out what they have to do with your own life or concerns. It's interesting that the author turns on his outlaw friends in the Hells Angels when they turn against the antiwar protesters in Berkeley/Oakland around 1965. The book ends ironically with the author riding his own motorcycle down the California coast highway after being stomped by a group of Hells Angels for an unexplained reason. Maybe they learned what the last 5% of the book said!