David Rudolph 
A Jew to the Jews [PDF ebook] 
Jewish Contours of Pauline Flexibility in 1 Corinthians 9:19–23. Second Edition

David J. Rudolph holds a Ph D from Cambridge University. He teaches New Testament and Jewish Studies at The King’s University in Southlake, TX. David has published numerous books and articles on the New Testament, Second Temple Judaism and Jewish-Christian relations. His recent publications include Introduction to Messianic Judaism: Its Ecclesial Context and Biblical Foundations (co-edited with Joel Willitts, 2013) and A Jew to the Jews: Jewish Contours of Pauline Flexibility in 1 Corinthians 9:19-23 (2011), which won the Franz Delitzsch Prize from the Freie Theologische Akademie in Germany.