Chris McCandless' Sister Pens New Book Detailing Parents' Violence and Abuse

Carine McCandless waited 22 years to write the story of what pushed her brother Chris to disappear into the Alaskan wilderness on an ill-fated adventure that was later chronicled in Jon Krakauer’s best-selling book Into the Wild and in Sean Penn’s 2007 movie of the same name.

“I just felt it was time,” Carine, 43, tells PEOPLE. “I think it’s important for people to have the facts.”

Eddie Vedder: Fatherhood 'Fueled My Anger' About World

Alternative-rock icon Eddie Vedder spearheaded a ’90s Seattle musical sound around adolescent angst. Now a 40-something father of a toddler, Vedder says he hasn’t mellowed.

“When I had a child, everyone was telling me that I was going to see the world through her eyes, and everything was going to get this nice gloss to it,” Vedder told reporters at Tuesday’s Into the Wild press conference in West Hollywood. “I kept waiting for that to happen, and thought there was a real problem with me that it wasn’t.”