Keeping in mind that the archival material for Pius XII's pontificate are still under embargo, until at least later this year according to earlier comments from the ASV, Ventresca's work may have some areas that will need expansion with the help from primary material that could emerge. However, the review of Ventresca's book that appears in the current online edition of the Jesuit magazine America suggests that this book is balanced, non-polemical, scholarly and built on sound historiography. The reviewer is David Kertzer of Brown University, Rhode Island, a recognised expert in Vatican-Italian-Jewish history.
Kertzer's review is positive and offers Ventresca a major plaudit when he says that the author allows the reader to judge for themselves on some of the major issues that have coloured, and which still do, Pacelli's life and papacy.
I have a copy that I have just started reading and I look forward to the rest of the book.