
Sarah B. answered 08/26/19
Experienced Tutor in Writing and English Help
It's really common for authors to incorporate portions of themselves in fictionalized stories (RE: The Bell Jar), but Salinger did write the introduction of the book to convey to his readers that Holden ended up in a mental institution. That's the lens he wanted you to read Holden's character through; not one of authorial confession, but one of psychiatric therapy.