A scholar of late eighteenth- and nineteenth-century literature and culture, he is particularly interested in the Regency years (1811–1820), Blackwood's Edinburgh Magazine, Jane Austen, and Thomas De Quincey.
[5] Morrison’s most recent book, The Regency Years, During Which Jane Austen Writes, Napoleon Fights, Byron Makes Love, and Britain Becomes Modern was published in North America by W. W.
[6][7] Under the title The Regency Revolution: Jane Austen, Napoleon, Lord Byron, and the Making of the Modern World, it was published in Britain by Atlantic.
With Daniel Sanjiv Roberts, he edited Romanticism and Blackwood's Magazine: "An Unprecedented Phenomenon" (2013) and Thomas De Quincey: New Theoretical and Critical Directions (2008).
He produced Jane Austen's Pride and Prejudice: A Sourcebook for Routledge (2005), and he edited Richard Woodhouse's Cause Book: The Opium-Eater, the Magazine Wars and the London Literary Scene in 1821[10] as a complete issue of the Harvard Library Bulletin (1998).