- I Have A Dream
- I Have a Dream, Martin Luther King
- I Heard the Bells on Christmas Day
- I Married a Ranger
- I Saw Three Ships and Other Winter Tales
- I Say No
- I Spy
- I Stood Tip-Toe Upon A Little Hill
- I am a Pilgrim
- I and My Chimney
- II
- Ice Creams, Water Ices, Frozen Puddings Together with Refreshments for all Social Affairs
- Ice-Caves of France and Switzerland
- The Iceberg Express
- Icelandic Primer with Grammar, Notes and Glossary
- The Ideal Bartender
- Ideal Commonwealths
- An Ideal Husband
- Ideala
- The Idiot
- Idle Ideas in 1905
- Idle Thoughts of an Idle Fellow
- The Idler in France
- The Idol of Paris
- Idylls of the King
- If I May
- If I Were King
- If Winter Comes
- If: a play in four acts
- Il Penseroso
- Ilka on the Hill-Top and Other Stories
- Illuminated Manuscripts
- Illusions A Psychological Study
- The Illustrated Alphabet of Birds
- The Illustrated London Reading Book
- The Illustrated War News, Number 15, Nov. 18, 1914
- The Illustrated War News, Number 21, Dec. 30, 1914
- Illustrated with Numerous Coloured Engravings, from Drawings Made on the Spot
- The Illustrious Gaudissart
- The Illustrious Prince
- Images from Campan's Marie Antoinette
- Images from Hamilton's Count Grammont
- Images from Harry Lorrequer
- Images from Memoirs Cardinal de Retz
- Images from Pepy's Diaries
- Images from Saint Simon's Louis XIV
- Images from The Works of Mark Twain
- Images from Works of Charles D. Warner
- Images from Works of John Galsworthy
- Images from Works of Oliver W. Holmes
- Images from Writings of Abraham Lincoln
- Images from Writings of William Dean Howells
- Images from the Confessions of J. J. Rousseau
- Images from the Works of Georg Ebers
- Images from the Works of George Meredith
- Images from the Works of Gilbert Parker
- The Imaginary Invalid
- Imaginary Portraits
- Imaginations and Reveries
- Imitation Of Spenser
- The Imitation of Christ
- Immediately Before, During, And Subsequent To, The Sanguinary Series Of Engagements Between The Allied Armies Of The French, From The 14th To The 19th October, 1813
- Immensee
- The Imp Of The Perverse
- Imperial Purple
- The Imperialist
- The Importance of Being Earnest
- The Impostures of Scapin
- Impressions De Theatre
- Impressions and Comments
- Impressions of Theophrastus Such
- Impressions of the South Wiltshire Downs
- The Improvement of Human Reason Exhibited in the Life of Hai Ebn Yokdhan
- Improvement of the Understanding
- In Accordance with the Request of the Late Henry Seybert
- In Camp on the Big Sunflower
- In Darkest England and the Way Out
- In Defence of Harriet Shelley
- In Defense of Women
- In Divers Tones
- In Exile and Other Stories
- In Flanders Fields and Other Poems
- In Freedom's Cause : a Story of Wallace and Bruce
- In Friendship's Guise
- In His Image
- In His Steps
- In Homespun
- In Indian Mexico (1908)
- In Kedar's Tents
- In Midsummer Days, and Other Tales
- In Morocco
- In Old Kentucky
- In Search of Gravestones Old and Curious
- In Search of the Castaways; or the Children of Captain Grant
- In Secret
- In Shadow of the Glen
- In The South Seas
- In Times of Peril
- In Two Volumes. Volume II.
- In Wicklow and West Kerry
- In a German Pension
- In a Green Shade A Country Commentary
- In a Hollow of the Hills
- In a Letter to a Friend in the Country
- In a Steamer Chair and Other Stories
- In and out of Three Normady Inns
- In the Bishop's Carriage
- In the Cage
- In the Carquinez Woods
- In the Claws of the German Eagle
- In the Closed Room
- In the Clutch of the War-God
- In the Court of King Arthur
- In the Courts of Memory, 1858 1875; from Contemporary Letters
- In the Days When the World Was Wide and Other Verses
- In the Days of Chivalry
- In the Days of My Youth
- In the Days of Poor Richard
- In the Days of the Comet
- In the Fog
- In the Footprints of the Padres
- In the Fourth Year Anticipations of a World Peace (1918)
- In the Heart of Africa
- In the Heart of the Rockies
- In the Irish Brigade A Tale of War in Flanders and Spain
- In the Library The Lady of the Barge and Others, Part 6.
- In the Midst of Alarms
- In the Name of the Bodleian and Other Essays
- In the Pecos Country / Lieutenant R. H. Jayne
- In the Quarter
- In the Ranks of the C.I.V.
- In the Reign of Terror
- In the Riding-School; Chats with Esmeralda
- In the Sargasso Sea A Novel
- In the Shadow of Death
- In the South Seas
- In the Sweet Dry and Dry
- In the Unseen
- In the Valley
- In the Wilderness
- In the Wrong Paradise
- In the Year 2889
- In the Year of Jubilee
- Inaugural Address
- Inaugural Presidential Address
- Inca Land Explorations in the Highlands of Peru
- The Inca of Perusalem
- Incidents in the Life of a Slave Girl Written by Herself
- Including Travels in Africa, Asia, Australasia, America, etc., etc., from 1827 to 1832
- Incognita; or, Love and Duty Reconcil'd
- The Incomplete Amorist
- Increasing Human Efficiency in Business, a contribution to the psychology of business
- Independent Bohemia An Account of the Czecho-Slovak Struggle for Liberty
- Indeterminate Sentence
- India's Love Lyrics
- Indian Addresses
- Indian Boyhood
- Indian Fairy Tales
- Indian Frontier Policy; an historical sketch
- Indian Games and Dances with Native Songs
- Indian Ghost Stories Second Edition
- Indian Heroes and Great Chieftains
- Indian Legends and Other Poems
- The Indian Lily and Other Stories
- Indian Summer
- Indian Summer of a Forsyte In Chancery
- Indian Tales
- Indian Unrest
- Indian Why Stories
- Indian speeches (1907-1909)
- Indiana Narratives
- Indians of the Yosemite Valley and Vicinity Their History, Customs and Traditions
- The Indiscreet Letter
- The Indiscretion of the Duchess
- Indiscretions of Archie
- The Indolence of the Filipino
- Industrial Biography, Iron Workers and Tool Makers
- Inebriety and the Candidate
- Inez A Tale of the Alamo
- The Infant System For Developing the Intellectual and Moral Powers of all Children, from One to Seven years of Age
- The Infant's Delight: Poetry
- The Infernal Marriage
- The Inferno
- The Influence of India and Persia on the Poetry of Germany
- The Influence of Old Norse Literature on English Literature
- Influences of Geographic Environment On the Basis of Ratzel's System of Anthropo-Geography
- The Inheritors
- The Inhumanity of Socialism
- Initial Studies in American Letters
- Initials Only
- Initiation into Literature
- Initiation into Philosophy
- Injun and Whitey to the Rescue
- An Inland Voyage
- The Inn Kitchen
- The Inn at the Red Oak
- Inn of Tranquillity
- The Inner Life, Part 3, from Volume VII, The Works of Whittier: the Conflict with Slavery, Politics and Reform, the Inner Life and Criticism
- The Inner Shrine
- The Inner Sisterhood A Social Study in High Colors
- The Innocence of Father Brown
- Innocent : her fancy and his fact
- The Innocents Abroad
- Inns and Taverns of Old London
- Inquiries and Opinions
- Inquiries into Human Faculty and Its Development
- An Inquiry Into The Nature And Causes Of The Wealth Of Nations
- An Inquiry into the Nature and Causes of the Wealth of Nations
- An Inquiry into the Permanent Causes of the Decline and Fall of Powerful and Wealthy Nations. Designed To Shew How The Prosperity Of The British Empire May Be Prolonged
- Insectivorous Plants
- The Insidious Dr. Fu Manchu
- Insights and Heresies Pertaining to the Evolution of the Soul
- Instructions on Modern American Bridge Building
- The Insurrection in Dublin
- The Insurrection in Paris
- The Intellectual Development of the Canadian People
- Intentions
- The Interdependence of Literature
- The Interlude of Wealth and Health
- Interludes being Two Essays, a Story, and Some Verses
- An International Episode
- International Finance
- International Language Past, Present and Future: With Specimens of Esperanto and Grammar
- International Miscellany of Literature, Art and Science, Vol. 1, No. 3, Oct. 1, 1850
- International Short Stories: French
- International Weekly Miscellany - Volume 1, No. 5, July 29, 1850
- International Weekly Miscellany - Volume 1, No. 6, August 5, 1850
- International Weekly Miscellany - Volume 1, No. 7, August 12, 1850
- International Weekly Miscellany - Volume 1, No. 8, August 19, 1850
- International Weekly Miscellany - Volume 1, No. 9, August 26, 1850
- An Interpretation of Rudolf Eucken's Philosophy
- Interpreted for practical use
- The Interpreters of Genesis and the Interpreters of Nature
- Into the Jaws of Death
- The Intriguers
- Introduction To The Metaphysic Of Morals
- An Introduction to Chemical Science
- Introduction to Non-Violence
- An Introduction to Philosophy
- An Introduction to Yoga
- Introduction to the Compleat Angler
- Introduction to the Dramas of Balzac
- Introduction to the Philosophy and Writings of Plato
- An Introduction to the Study of Browning
- An Introduction to the Study of Robert Browning's Poetry
- An Introduction to the mortuary customs of the North American Indians
- Introductory American History
- An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes
- The Intrusion of Jimmy
- Invisible Links
- The Invisible Man
- Iola Leroy Shadows Uplifted
- Ion
- Ireland Since Parnell
- Ireland Under Coercion (2nd ed.) (1 of 2) (1888)
- Ireland Under Coercion (2nd ed.) (2 of 2) (1888)
- Ireland, Historic and Picturesque
- Irish Fairy Tales
- Irish Plays and Playwrights
- Irish Race in the Past and the Present
- Irish Wit and Humor Anecdote Biography of Swift, Curran, O'Leary and O'Connell
- Irish Wonders
- The Iron Furrow
- The Iron Game A Tale of the War
- The Iron Heel
- The Iron Rule
- The Iron Trail
- An Iron Will
- The Iron Woman
- The Irrational Knot Being the Second Novel of His Nonage
- Is Life Worth Living?
- Is Mars Habitable?
- Is Shakespeare Dead? from my autobiography
- Is Ulster Right?
- Isaac Bickerstaff, physician and astrologer
- Isaac T. Hopper
- Isabella; Or, The Pot Of Basil
- Ishmael In the Depths
- Island Nights' Entertainments
- The Island Of The Fay
- The Island Pharisees
- The Island of Doctor Moreau
- The Island of Faith
- The Isle of Unrest
- The Isles of Sunset
- Ismailia
- Isobel : a Romance of the Northern Trail
- Isopel Berners The History of certain doings in a Staffordshire Dingle, July, 1825
- Israel Potter
- Israfel
- Issues in Ethics
- Issues in Population and Bioethics
- It Happened in Egypt
- It Is Never Too Late to Mend
- Italian Hours
- Italian Journeys
- Italian Letters, Vols. I and II The History of the Count de St. Julian
- Italian Wrought Iron
- Italy at War and the Allies in the West
- Itineray of Baldwin in Wales
- Its Medieval Remains
- Its Representative Men
- Its Story and Its Lessons
- Its trials and triumphs
- Ivanhoe
- The Ivory Child
- The Ivory Trail
- Ixion In Heaven