The Yiddish Policemen's Union by Michael Chabon

In an alternate reality where Jewish refugees found sanctuary in Alaska during World War II, the book follows a homicide detective in the Yiddish-speaking metropolis of Sitka as he investigates the murder of a former chess prodigy. The detective's quest takes him from the city's seedy underbelly to the highest echelons of power, and he uncovers a vast conspiracy that threatens the very existence of the Jewish homeland in Alaska. The novel is a blend of detective fiction, alternate history, and Jewish humor.

The 1211th greatest book of all time