It was Thompson's first published book and his first attempt at a
nonfiction novel.
...
Thompson spent the next year preparing for the new book in close quarters with the Hells Angels, in particular the
San Francisco and
Oakland chapters of the club and their president
Ralph "Sonny" Barger. Thompson was upfront with the Angels about his role as a journalist, a dangerous move given their marked distrust of reporters from what the club considered to be bad press. Thompson was introduced to the gang by Birney Jarvis, a former club member and then police-beat reporter for the
San Francisco Chronicle. This introduction, coming from an Angel and reporter, allowed Thompson to get close to the gang in a way others had not been able.
...
The book details Thompson's experiences living with the
Hells Angels, a notorious
motorcycle club in California. The author spent over a year embedded with one chapter, learning their unique subculture and immersing himself in their lifestyle. He recounts his time spent traveling through California by motorcycle, and describes the contrast between the general lawlessness of the club and the exaggerated fear that very lawlessness engenders in society. According to a contemporary
New York Times review of the book, Thompson relates how he "drank at their bars, exchanged home visits, recorded their brutalities, viewed their sexual caprices, became converted to their motorcycle mystique, and was so intrigued, as he puts it, that 'I was no longer sure whether I was doing research on the Hell's Angels or being slowly absorbed by them.' "
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