I was surprised to find quite a few books in the National Emergency Library that may be of interest to this group. Some of them are either out of print or not available in my local library system.
Under Topics & Subjects on the left side of the page, I clicked on "Jews" and then limited my search to books in English (under Language). The default order seems to be by date published, starting with the oldest books in the collection, but if you sort them alphabetically by title, you get a better sense of what's available.
Here are just a few examples:
A Brotherhood of Memory: Jewish Landsmanshaftn in the New World
A Student's Guide to Jewish American Genealogy
A Century of Ambivalence: the Jews of Russia and the Soviet Union, 1881 to the Present
A Bintel Brief: Sixty Years of Letters from the Lower East Side from the Jewish Daily Forward
Our Parents' Lives: The Americanization of Eastern European Jews
There are also memoirs, Yiddish folktales, novels, books about history, etc. If you're looking for a particular title, it's definitely worth a look.
Researching WEISSMAN/VAYSMAN (Ostropol, Ukraine); MOROZ and ESTRIN/ESTERKIN (Shklov & Bykhov, Belarus); LESSER/LESZEROVITZ, MAIMAN, and BARNETT/BEINHART/BERNHART (Lithuania/Latvia); and ROSENSWEIG/ROSENZWEIG, KIRSCHEN, and SCHWARTZ (Botosani, Romania)