Liddle has an international reputation as an expert in nineteenth-century British newspapers and the periodical press. An officer of the Research Society for Victorian Periodicals, he has published scholarly articles on Victorian press anonymity, the origins of the newspaper editorial, the journalism of George Eliot, and the journalistic context of the Victorian “sensation novel.” His first book, The Dynamics of Genre: Journalism and the Practice of Literature in Mid-Victorian Britain (University of Virginia Press, 2009), investigated the relationship between literary and journalistic genres in Britain between 1850 and 1865. His current book project, tentatively titled “The Technology of Literary Form,” uses methods pioneered by the digital humanities to trace technological patterns in the development of British novels and newspapers.