* Theatre of War: What Is Happening to the British Stage Today? (1964): A critical examination of the state of British theater in the 1960s, focusing on the decline of traditional theater and the rise of new, experimental forms.
* Peter Brook: A Biography (1979): A biography of the influential theater director Peter Brook, examining his life, career, and contributions to the world of theater.
* The Drama of Chekhov (1981): An analysis of the plays of Russian playwright Anton Chekhov, exploring their themes, characters, and theatrical techniques.
* The Arts on TV: A History (1990): A comprehensive history of the relationship between the arts and television, covering a wide range of artistic disciplines, including theater, dance, music, and visual art.
* Director's Cut: A Memoir (2010): Kustow's autobiography, reflecting on his life and career in the arts, including his work as a theater director, producer, and arts administrator.
* Chekhov: The Making of a Dramatist (2011): An exploration of the life of Anton Chekhov, focusing on his development as a playwright and the influences on his work.
Additionally, Kustow edited several books and anthologies, including "The Routledge Dictionary of Theatre" (1995) and "The Oxford Dictionary of Theatre" (2004), which are considered essential reference works in the field of theater studies.
Kustow's writings are known for their comprehensive research, critical insight, and passion for the arts, and they have made significant contributions to the understanding and appreciation of theater and the arts.