“Postville: A Clash of Cultures in Heartland America” is about what happens in the town of Postville, Iowa (pop. 1,500) after a group of Lubavitcher Hasidic Jews moved there to open the world’s largest kosher slaughterhouse in 1987. Bloom brings a unique perspective to the story, bridging the two cultures as a secular Jew who had recently moved his family from San Francisco to Iowa City to become a professor of journalism at the University of Iowa. As I read, I couldn’t help picturing Postville as Poseyville, Indiana, where I grew up, and I’d recommend it to anyone who has lived the cognitive dissonance of growing up in a small town and moving to a big, multicultural city (or vice versa).