The Haggadah, the Jewish religious text read at Passover, is 3,000 years old. It has been translated more than any Jewish book, from ancient times, to 14th-century Sarajevo, to the just-published “New American Haggadah.” The new version, edited by Jonathan Safran Foer and translated by Nathan Englander, began as a personal project for Jonathan. He started to realize how little he truly understood about his own belief system, and that many American Jews feel like immigrants to their own religion. “I went to Hebrew school, I was bar mitzvah’d, I’ve been to Israel a number of times, but as I started to work on this book, I realized that I really had to confront my ignorance, my lack of Jewish literacy.” Nine years after the project began, Jonathan Safran Foer and Nathan Englander have constructed a new Haggadah, religious, yet modern, for the American Jews of their generation.