Author
Masques & Poems (1922)
Poems (1926)
Inscription on a Fountainhead (1929), poetry pamphlet
Baudelaire And The Symbolists: Five Essays (1929)
The Phoenix Kind (1931), novel
A Superficial Journey Through Tokyo and Peking (1932), travel memoir
A Letter to Mrs. Virginia Woolf (Hogarth Press 1932)
Byron (1934), Duckworth "Great Lives" series
Byron: The Years of Fame (1935)
Somerset (1936), Shell Guide (with his father, C. H. B. Quennell)
Victorian Panorama: A Survey of Life & Fashion from Contemporary Photographs (1937)
Sympathy (1938), short stories (Quennell's last attempt at fiction)
Caroline of England: An Augustan Portrait (1940)
Byron In Italy (1941)
Four Portraits: Studies of the Eighteenth Century – James Boswell, Edward Gibbon, Laurence Sterne, John Wilkes (1945)
John Ruskin: The Portrait of a Prophet (1949)
The Singular Preference: Portraits & Essays (1952)
Spring In Sicily (1952), travel book
Diversions of History (1954)
Hogarth's Progress (1955)
The Past We Share. An Illustrated History of the British and American Peoples (1960), with Alan Hodge
The Sign of the Fish (1960, autobiographical essays)
Alexander Pope: The Education of Genius 1688–1728 (1968)
The Colosseum: A History of Rome from the Time of Nero (1971)
Shakespeare: A Biography (1963)
Who's Who in Shakespeare (1971)
Casanova in London (1971), essays
Marcel Proust, 1871–1922: A Centennial Volume (1971)
Samuel Johnson: His Friends and Enemies (1973)
A History of English Literature (1973)
The Marble Foot: An Autobiography, 1905–1938 (1977), vol. 1 of autobiography
The Day Before Yesterday: A Photographic Album of Daily Life in Victorian and Edwardian Britain (1978)
Customs and Characters: Contemporary Portraits (1982)
Wanton Chase: An Autobiography from 1939 (1980), vol. 2 of autobiography
The Last Edwardians: An Illustrated History of Violet Trefusis and Alice Keppel (1985) with John Phillips and Lorna Sage
The Pursuit of Happiness (1988)