- Isänmaa (Finnish) by Järnefelt, Arvid
- Isa Pang Bayani (Tagalog) by Arsciwals, Juan L.
- I Saw Three Ships and Other Winter Tales (English) by Quiller-Couch, Arthur Thomas, Sir
- I Say No (English) by Collins, Wilkie
- Ishmael - In the Depths (English) by Southworth, Emma Dorothy Eliza Nevitte
- Isidora (French) by Sand, George
- Island Nights' Entertainments (English) by Stevenson, Robert Louis
- The Island of Doctor Moreau (English) by Wells, H. G. (Herbert George)
- The Island of Doctor Moreau (English) by Wells, H. G. (Herbert George)
- The Island of Faith (English) by Sangster, Margaret E. (Margaret Elizabeth)
- The Island Pharisees (English) by Galsworthy, John
- The Isle of Unrest (English) by Merriman, Henry Seton
- The Isles of Sunset (English) by Benson, Arthur Christopher
- Is Life Worth Living? (English) by Mallock, William Hurrell
- Ismailia (English) by Baker, Samuel White, Sir
- Is Mars Habitable? (English) by Wallace, Alfred Russel
- Isobel : a Romance of the Northern Trail (English) by Curwood, James Oliver
- Isopel Berners - The History of certain doings in a Staffordshire Dingle, July, 1825 (English) by Borrow, George Henry
- Isopel Berners - The History of certain doings in a Staffordshire Dingle, July, 1825 (English) by Seccombe, Thomas
- I Spy (English) by Lincoln, Natalie Sumner
- Israël en Égypte - Étude sur un oratorio de G.F. Hændel (French) by Bouchor, Maurice
- Israel Potter (English) by Melville, Herman
- Is Shakespeare Dead? (English) by Twain, Mark
- Is Shakespeare Dead? from my autobiography (English) by Twain, Mark
- Issues in Ethics (English) by Vaknin, Sam
- Issues in Population and Bioethics (English) by Vaknin, Sam
- Is Ulster Right? (English) by Anonymous
- Italian Hours (English) by James, Henry
- Italian Journeys (English) by Howells, William Dean
- Italian Letters, Vols. I and II - The History of the Count de St. Julian (English) by Godwin, William
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