In Coreyography, Feldman writes that his late friend recounted sexual abuse on the set of 1986's "Lucas," when “an adult male convinced him that it was perfectly normal for older men and younger boys in the business to have sexual relations, that it was what all the guys do."
“So they walked off to a secluded area between two trailers … and Haim allowed himself to be sodomized," Feldman recalls in the memoir, according to The New York Post.
Now 42, Feldman says that when Haim asked if he wanted "play around" too, the "Stand By Me" star replied "No, that's not what kids do, man."
Feldman doesn't name the culprit, but writes that he "walks around, one of the most successful people in the entertainment industry, still making money hand over fist."
Feldman also experienced sexual abuse at the hands of an assistant, identified as "Ron," who allegedly drugged the young actor and performed sexual acts on him.
“Slowly, over a period of many years, I would begin to realize that many of the people I had surrounded myself with were monsters," Feldman writes.
After several years battling drug addiction, Haim died of pneumonia in 2010.
Feldman, who fought often with his friend on their set of the 2008 reality show, "The Two Coreys," also described physical and emotional abuse at the hands of his mother.
“People always ask me about life after childhood stardom," Feldman concludes. "What would I say to parents of children in the industry? My only advice, honestly, is to get these kids out of Hollywood and let them lead normal lives.”
Notable deaths of 2014 [PHOTOS]