User blog comment:Dark Cyan/Cyan's Rap Battles of Literature 23: Jeff Kinney vs Anne Frank/@comment-4984811-20160424101147/@comment-5412428-20160424200030

No, he dictated it to a dude named Hess who wrote it. Hitler basically talked about his life, answered some questions, but Hess wrote the majority of what it's in the book today. And by majority I mean like 99 percent of it.