Commentators have long argued about whether to read Paul's personification of Sin in Romans literally or figuratively. Matthew Croasmun suggests both that the cosmic power Sin is nothing more than an emergent feature of a vast network of human transgression and that this power is nevertheless a real person. Written with verve, clarity, and erudition, this book is a breath of fresh air for the guild of Pauline studies. Arguing that a fresh engagement with Paul's language about sin requires an interdisciplinary approach, Croasmun points the way to urgently needed new ways of reading Paul's letters in a twenty-first century context. Required reading for serious interpreters of Paul.