Doing the right thing was a challenge in the days of the Holocaust, when those protecting Jews and others from Nazi concentration camps could face the same fate if caught.

Those who hid Jews or aided them in escaping to places where they wouldn’t face internment in concentration camps were called “The Righteous Few.”

Two among them were Frans and Mien Wijnakker, a Catholic Dutch couple whose mission to rescue Jews from Nazi clutches was memorialized in their village of Dieden, in the south of the Netherlands, where Frans also recorded oral histories before his death.

Now the Wijnakkers’ story has been given a new voice by Marty Brounstein, a San Mateo consultant and author who has written a book that describes how the couple became involved in assuring the survival of about two dozen Jews, including an infant, who were being hunted by Nazis. “It was like a big jigsaw puzzle with pieces missing,” Brounstein said.

Brounstein will talk about his book, “Two Among the Righteous Few: A Story of Courage in the Holocaust,” and related stories at a Friends of the Library presentation Wednesday at Benicia Public Library.

In an interview Monday he said he and his wife, Leah, visited the Holocaust Museum, Yad Vashem, in Jerusalem, where a section called “The Righteous Among the Nations” honors Christians and other non-Jews who risked their own lives to rescue Jews. Among them: Oskar Schindler, whose story was told in the movie “Schindler’s List.”

The author and his wife also visited Dieden, where he learned he had his own to the story he discovered there.

Since the book’s publication, Brounstein has spoken more than 360 times in the past four years to school children, business firms, community organizations and others, traveling to Chicago, Seattle, Phoenix, Los Angeles and Canada to describe the story he discovered in Dieden, one of the happier-ending Holocaust remembrances of that tragic era. “There’s always a great discussion,” he said. “It’s a great story.”

Brounstein will speak at 7 p.m. Wednesday at Benicia Public Library, 150 East L St. His website is www.MartyABrounstein.com and his Facebook page is www.facebook.com/MartyA.Brounstein.