At the Washington Post, Sophia Nguyen is joining Book World as news and features writer, "reporting on developments in the literary field," starting March 20. She moves over from the National Politics desk, where she was an assistant editor. Becca Rothfield joins as the paper's nonfiction book critic starting April 10. Her work has appeared regularly in the New Yorker, the Atlantic, the New York Times, Bookforum, the New York Review of Books and elsewhere.