This is a really remarkable book. Even as debates over situating New Testament texts “within Judaism” continue to roil biblical studies, Hedner Zetterholm, Runesson, and their outstanding contributors pause to theorize the question itself, to explore what is at stake, and for whom, and to point to promising ways forward. The authors of the twenty-five chapters are expert guides to a difficult but extremely important field of research. This will be a book to come back to again and again.