I've recently finished a novel by Michael Chabon called The Yiddish Policeman's Union. Set in the Jewish territory established in the 1930's on Baranof Island in Alaska, it's a hard-boiled detective novel. Yeah, right. Actually, it's one of the best books I've read in recent years and I'm telling so many people about it, I'm certain I'm getting annoying.
Chabon has a marvelous sense of language, and the setting is based in historical fact: there was a movement in the US congress to establish just such a territory, but it failed to pass. The characterizations of the various Yids and groups thereof in the novel are fabulous, as are the digressions on this, that, and the other.
Highly recommended!