A prolific author, Sonny wrote about his life philosophy in his memoir, Hell's Angel: The Life and Times of Sonny Barger and the Hell's Angels Motorcycle Club. Ridin' High, Livin' Free: Hell-Raising Motorcycle Stories is a collection of personal anecdotes detailing his wildest experiences while on the road. Freedom: Credos From the Road takes a similar approach.

Sonny's tragic passing was announced via a Facebook post on Wednesday, June 29, 2022. As the note states, Sonny died following a battle with cancer. He was surrounded by his loved ones.

"If you are reading this message, you'll know that I’m gone. I've asked that this note be posted immediately after my passing. I've lived a long and good life filled with adventure," the statement reads. "And I've had the privilege to be part of an amazing club."

"Although I've had a public persona for decades, I've mostly enjoyed special time with my club brothers, my family, and close friends," the statement continues. "Please know that I passed peacefully after a brief battle with cancer. But also know that in the end, I was surrounded by what really matters: My wife, Zorana, as well as my loved ones. Keep your head up high, stay loyal, remain free, and always value honor."