It’s definitely worth reading - there’s a picture of RD on the cover (and a recommendation by QT about the book itself on the book - i think he likens it to pot or something!).
He was actually talking about the first book
Easy Riders, Raging Bulls. Which is also a really cool book.
Here’s the exact quote,
“Your book was so goddamn well written, I was like, I don’t want to know these things about these people, my heroes, but then I made the mistake of leaving it by my bedside table, and it was like a bag of pot, with me saying I’m not gonna smoke. But I was insatiable.” -Quentin Tarantino