A summary of how to read Romans 1-4 in "Beyond Justification: Liberating Paul's Gospel"?

Can someone give a summary of how to read Romans 1-4 in "[Beyond Justification: Liberating Paul's Gospel](https://www.goodreads.com/book/show/205122128-beyond-justification) "? From a [podcast](https://wipfandstock.com/blog/2024/03/05/douglas-a-campbell-and-jon-depue-liberating-pauls-gospel-from-justification-theory/) , I got the idea that Paul actually starts with a Socratic argument, rather than plainly stating what he believes and how things work. I'm not sure if I properly understood it though. According to the authors of the book, Romans 1-4 is the basis for "Justification Theory", an Atonement Theory often in the form of Penal Substitution. But 90% of what Paul wrote, "the gospel" as laid out by Paul in the rest of his corpus, doesn't work like that, namely: your faith in Christ is a sign that you are elected and thus saved and equipped to do good works. Perhaps I got that part wrong too, feel free to correct me.