A dance historian and critic, she is the author of Diaghilev's Ballets Russes and Legacies of Twentieth-Century Dance, and the editor of several books, including The Diaries of Marius Petipa, André Levinson on Dance (with Joan Acocella), José Limón: An Unfinished Memoir, and The Ballets Russes and Its World. She has curated several exhibitions, including Dance for a City: Fifty Years of the New York City Ballet, New York Story: Jerome Robbins and His World, andDiaghilev’s Theater of Marvels: The Ballets Russes and Its Aftermath. A former Getty Scholar, she is a recipient of fellowships from the John Simon Guggenheim Memorial Foundation and the Cullman Center for Scholars and Writers as well as a 2016 Dance Magazine Award. Editor for several years of the book series Studies in Dance History, she has written for Dance Magazine, Dance Research, The Nation, and many other publications. A member of Columbia University’s Harriman Institute and the organizer of conferences, symposia, and public programs on the history of ballet and twentieth-century dance generally, she is currently working on a book about the choreographer Bronislava Nijinska.