[W]ell-researched and well-argued ... [Ricker] successfully shows how the norms of ancient subcultural association network letters illuminate much of Rom 12–15. His thesis goes a long way toward clarifying why Romans appears generic in comparison to Paul’s other letters despite being addressed to a specific community ... Ricker’s study does much to illuminate the paraenetic material of Rom 12–15 and to explain a number of the particularities of this letter in comparison to the rest of the undisputed Paulines. Any scholar interested in Romans would do well to spend time with this book.