This article (available free here), by Henry Kelly is of relevance to discussions here.
“The common notion that Adam was punished by death for his sin is verified neither in Genesis 2–3 itself (and the surrounding chapters) nor in any pre-Pauline texts. Paul’s focus on Adam’s sin was out of the ordinary, and his conclusion that he was punished by some kind of death does not resemble interpretations in any other contemporary source, including Philo. The equally common idea that the Devil was assumed to participate in causing Adam’s sin does not occur in early texts (for instance, Wisdom or the books of the New Testament), being first found in Justin Martyr. Therefore, assessments of biblical theology that depend on these concepts should be emended.”
Kelly is a leading scholar on the subject of satan and demons, but in this case it’s his focus on Adam which is of particular relevance.