Ronald J. Rychlak's Righteous Gentiles: How Pius XII and the Catholic Church Saved Half a Million Jews from the Nazis is reviewed, with two other books on the same subject, on Catholic Online:
These three books, taken together, absolutely decimate the attacks on the reputation of Pope Pius XII made in the spate of books. They meticulously re-examine the charges against Pope Pius, charges which sadly have become deeply embedded in the very grain of our culture.
Rychlak's book, Righteous Gentiles: How Pius XII and the Catholic Church Saved Half a Million Jews from the Nazis, in a sense comes closest to that goal, narrating Pope Pius' life within the context of his times. (The Rychlak estimate of 500,000 Jews saved by the church—in its convents and monasteries, through papers given to Jews by its diplomats enabling them to escape Europe, and the like—is a moderate one. Others range up to 800,000.)