This was a groundbreaking work on the attempt by Organized Jewry to influence, direct and subvert the discussion, documents, and teachings of Vatican II, especially on Jewish-Christian relations. I believe it was an important source for at least one of the chapters in E Michael Jones' monumental work, The Jewish Revolutionary Spirit and its Impact on World History (
culturewars.com). I was surprized to see Poncin's book here since it was only written in 1967.