<p>Aaron Retica talks about Tim Marshall’s “A Flag Worth Dying For,” and Jill Eisenstadt discusses her new novel, “Swell.”</p>

The History of the London Zoo

The world's top authors and critics join host Gilbert Cruz and editors at The New York Times Book Review to talk about the week's top books, what we're reading and what's going on in the literary world.

Listen to this podcast in New York Times Audio, our new iOS app for news subscribers. Download now at nytimes.com/audioapp