| Kjelgaard, Jim (James Arthur) | Two Dogs and a Horse | 1964 |
| Kjelgaard, Jim (James Arthur) | Ulysses and His Woodland Zoo | 1959 |
| Kjelgaard, Jim (James Arthur) | We Were There at the Oklahoma Land Run (We Were There #12) | 1957 |
| Kjelgaard, Jim (James Arthur) | Wild Trek | 1950 |
| Kjelgaard, Jim (James Arthur) | Wildlife Cameraman | 1957 |
| Kjelgaard, Jim (James Arthur) | Wolf Brother | 1957 |
| Klapper, Paul | Teaching Children to Read | 1914 |
| Kleist, Heinrich von | Das Erdbeben in Chili | 1807 |
| Klickmann, Flora | Flower-Patch Neighbours [Flower-Patch Series #4] | 1928 |
| Klickmann, Flora | Mystery in the Windflower Wood | 1932 |
| Klickmann, Flora | The Flower-Patch Garden Book [Flower-Patch Series #6] | 1933 |
| Klickmann, Flora | The Lady-with-the-Crumbs | 1931 |
| Klickmann, Flora | The Trail of the Ragged Robin [Flower-Patch Series #3] | 1921 |
| Klickmann, Flora | Weeding the Flower-Patch [Flower-Patch Series #7] | 1948 |
| Kline, Otis Adelbert | Maza of the Moon | 1930 |
| Kline, Otis Adelbert | Prince of Peril | 1930 |
| Kline, Otis Adelbert | Race Around the Moon | 1939 |
| Kline, Otis Adelbert | Revenge of the Robot | 1936 |
| Kline, Otis Adelbert | Robot Beasts | 1941 |
| Kline, Otis Adelbert | Servant of Satan | 1939 |
| Kline, Otis Adelbert | Stranger from smallness | 1941 |
| Kline, Otis Adelbert | The Dragoman's Confession | 1932 |
| Kline, Otis Adelbert | The Dragoman’s Secret | 1931 |
| Kline, Otis Adelbert | The Iron World | 1937 |
| Kline, Otis Adelbert | The Man Who Limped | 1930 |
| Kline, Otis Adelbert | The Outlaws of Mars | 1933 |
| Kline, Otis Adelbert | The Swordsman of Mars | 1933 |
| Knight, Eric | Invitation to Life | 1934 |
| Knight, Eric | Lassie Come-Home | 1940 |
| Knight, Eric | Sam Small Flies Again: The Amazing Adventures of The Flying Yorkshireman | 1937 |
| Knight, Eric | This Above All | 1941 |
| Knister, Raymond | My Star Predominant | 1934 |
| Knister, Raymond | White Narcissus | 1929 |
| Knowles, Mabel Winifred | A Heather Holiday | 1923 |
| Knowles, Mabel Winifred | Jill the Hostage | 1925 |
| Knowles, Mabel Winifred | Kits at Clynton Court School | 1924 |
| Knowles, Mabel Winifred | The Girls of Old Grange School | 1925 |
| Knowles, Mabel Winifred | Two Girls in the Wild | 1923 |
| Knowles, Robert E. | The Attic Guest | 1909 |
| Knox, Ronald Arbuthnott | Nazi and Nazarene | 1940 |
| Knox, Ronald Arbuthnott | The Footsteps at the Lock | 1928 |
| Knox, Ronald Arbuthnott | The Three Taps: A detective story without a moral | 1940 |
| Koch, Theodore W. (Wesley) | Some Old-Time, Old-World Librarians | 1914 |
| Kolb, Anna Mathilde | Daphne Herbst | 1927 |
| Kolb, Anna Mathilde | Die Schaukel | 1934 |
| Kolb, Anna Mathilde | Kein Krieg in Troja | 1935 |
| Konopnicka, Maria | Miłosierdzie gminy | 1908 |
| Konopnicka, Maria | Nasza szkapa | 1907 |
| Kornbluth, Cyril M. | A Mile Beyond the Moon | 1958 |
| Kornbluth, Cyril M. | Crisis! | 1942 |
| Kornbluth, Cyril M. | Dead Center! | 1941 |
| Kornbluth, Cyril M. | Einstein’s Planetoid | 1942 |
| Kornbluth, Cyril M. | Iteration | 1950 |
| Kornbluth, Cyril M. | King Cole of Pluto | 1940 |
| Kornbluth, Cyril M. | Masquerade | 1942 |
| Kornbluth, Cyril M. | Ms. Found in a Chinese Fortune Cookie | 1957 |
| Kornbluth, Cyril M. | Not This August [Christmas Eve] | 1955 |
| Kornbluth, Cyril M. | Reap the Dark Tide | 1958 |
| Kornbluth, Cyril M. | Takeoff | 1954 |
| Kornbluth, Cyril M. | Takeoff, Part 1 | 1954 |
| Kornbluth, Cyril M. | Takeoff, Part 2 | 1954 |
| Kornbluth, Cyril M. | Takeoff, Part 3 | 1954 |
| Kornbluth, Cyril M. | The Altar at Midnight | 1952 |
| Kornbluth, Cyril M. | The Best of C. M. Kornbluth | 1976 |
| Kornbluth, Cyril M. | The City in the Sofa | 1941 |
| Kornbluth, Cyril M. | The Golden Road | 1942 |
| Kornbluth, Cyril M. | The Little Black Bag | 1950 |
| Kornbluth, Cyril M. | The Luckiest Man in Denv | 1952 |
| Kornbluth, Cyril M. | The Marching Morons | 1951 |
| Kornbluth, Cyril M. | The Naked Storm | 1952 |
| Kornbluth, Cyril M. | The Perfect Invasion | 1942 |
| Kornbluth, Cyril M. | The Reversible Revolutions | 1941 |
| Kornbluth, Cyril M. | The Rocket of 1955 | 1941 |
| Kornbluth, Cyril M. | The Syndic | 1953 |
| Kornbluth, Cyril M. | Theory of Rocketry | 1958 |
| Kornbluth, Cyril M. | Thirteen O'Clock | 1940 |
| Kornbluth, Cyril M. | Time Bum | 1953 |
| Kornbluth, Cyril M. | What Sorghum says | 1941 |
| Kornbluth, Cyril M. | With These Hands | 1951 |
| Kotzebue, August Friedrich Ferdinand von | De Berlin a Paris en 1804 | 0 |
| Kraus, René | The Men Around Churchill | 1941 |
| Kraus, René | Winston Churchill, A Biography | 1940 |
| Kraus, René | Young Lady Randolph | 1943 |
| Krebs, Richard Julius Herman | Out of the Night | 1941 |
| Krenkel, Peter Maximilian | Josephus und Lucas | 1894 |
| Kuhn, Isobel | By Searching | 1957 |
| Ķurzēns, Nikolajs | Mia spektro | 1938 |
| Kuttner, Henry | A God Named Kroo | 1944 |
| Kuttner, Henry | A Million Years to Conquer [The Creature from beyond Infinity] | 1952 |
| Kuttner, Henry | Absalom | 1946 |
| Kuttner, Henry | All is Illusion | 1940 |
| Kuttner, Henry | Android | 1951 |
| Kuttner, Henry | As You Were | 1950 |
| Kuttner, Henry | Atomic! | 1947 |
| Kuttner, Henry | Avengers of Space | 1938 |
| Kuttner, Henry | Baby Face | 1945 |
| Kuttner, Henry | Bamboo Death | 1936 |
| Kuttner, Henry | Beauty and the Beast | 1940 |
| Kuttner, Henry | Before I Wake | 1945 |
| Kuttner, Henry | Beyond the Phoenix | 1938 |
| Kuttner, Henry | Call Him Demon | 1946 |
| Kuttner, Henry | Carry Me Home | 1950 |
| Kuttner, Henry | Chameleon Man | 1941 |
| Kuttner, Henry | Chessboard Planet | 1946 |
| Kuttner, Henry | Cold War (Hogben #5) | 1949 |
| Kuttner, Henry | Dark Dawn | 1947 |
| Kuttner, Henry | Dictator of the Americas | 1938 |
| Kuttner, Henry | Don't Look Now | 1948 |
| Kuttner, Henry | Doom World (Tony Quade #2) | 1938 |
| Kuttner, Henry | Dr. Cyclops | 1940 |
| Kuttner, Henry | Dragon Moon | 1941 |
| Kuttner, Henry | Dream's End | 1947 |
| Kuttner, Henry | Ex Machina | 1948 |
| Kuttner, Henry | Exit the Professor (Hogben #2) | 1947 |
| Kuttner, Henry | Extrapolation | 1948 |
| Kuttner, Henry | Gallegher Plus | 1943 |
| Kuttner, Henry | Golden Apple | 1951 |
| Kuttner, Henry | Hands Across the Void | 1938 |
| Kuttner, Henry | Happy Ending | 1948 |
| Kuttner, Henry | Hollywood on the Moon (Tony Quade #1) | 1938 |
| Kuttner, Henry | Hydra | 1939 |
| Kuttner, Henry | I am Eden | 1946 |
| Kuttner, Henry | I am the Wolf | 1937 |
| Kuttner, Henry | I, the Vampire | 1937 |
| Kuttner, Henry | It Walks By Night | 1936 |
| Kuttner, Henry | Jesting Pilot | 1947 |
| Kuttner, Henry | Juke-Box | 1947 |
| Kuttner, Henry | Lands of the Earthquake | 1947 |
| Kuttner, Henry | Lord of the Storm | 1947 |
| Kuttner, Henry | Man About Time | 1940 |
| Kuttner, Henry | Margin for Error | 1947 |
| Kuttner, Henry | Mutant | 1953 |
| Kuttner, Henry | No Man's World | 1940 |
| Kuttner, Henry | Noon | 1947 |
| Kuttner, Henry | Nothing but Gingerbread Left | 1943 |
| Kuttner, Henry | Or Else | 1953 |
| Kuttner, Henry | Pegasus | 1940 |
| Kuttner, Henry | Percy the Pirate | 1945 |
| Kuttner, Henry | Pile of Trouble (Hogben #3) | 1948 |
| Kuttner, Henry | Private Eye | 1949 |
| Kuttner, Henry | Project | 1947 |
| Kuttner, Henry | Promised Land | 1950 |
| Kuttner, Henry | Raider of the Spaceways | 1937 |
| Kuttner, Henry | Rain Check | 1946 |
| Kuttner, Henry | Remember Tomorrow | 1941 |
| Kuttner, Henry | Reverse Atom | 1940 |
| Kuttner, Henry | Satan Sends Flowers [By These Presents] | 1953 |
| Kuttner, Henry | Science Is Golden | 1940 |
| Kuttner, Henry | Secret of the Earth Star | 1942 |
| Kuttner, Henry | See You Later (Hogben #4) | 1949 |
| Kuttner, Henry | Spawn of Dagon | 1938 |
| Kuttner, Henry | Suicide Squad | 1939 |
| Kuttner, Henry | Swing Your Lady | 1944 |
| Kuttner, Henry | Sword of Tomorrow | 1945 |
| Kuttner, Henry | The Big Night | 1947 |
| Kuttner, Henry | The Bloodless Peril | 1937 |
| Kuttner, Henry | The Citadel of Darkness | 1939 |
| Kuttner, Henry | The Comedy of Eras | 1940 |
| Kuttner, Henry | The Cure | 1946 |
| Kuttner, Henry | The Curse of the Crocodile | 1939 |
| Kuttner, Henry | The Dark Angel | 1946 |
| Kuttner, Henry | The Dark Heritage | 1938 |
| Kuttner, Henry | The Dark World | 1946 |
| Kuttner, Henry | The Devil’s Brood | 1939 |
| Kuttner, Henry | The Disinherited | 1938 |
| Kuttner, Henry | The Dweller in the Tomb | 1937 |
| Kuttner, Henry | The Ego Machine | 1952 |
| Kuttner, Henry | The Frog | 1939 |
| Kuttner, Henry | The Graveyard Rats | 1936 |
| Kuttner, Henry | The Greeks had a War for it | 1941 |
| Kuttner, Henry | The Invaders | 1939 |
| Kuttner, Henry | The Jest of Droom-Avista | 1937 |
| Kuttner, Henry | The Land of Time to Come | 1941 |
| Kuttner, Henry | The Little Things | 1946 |
| Kuttner, Henry | The Mad Virus | 1940 |
| Kuttner, Henry | The Mask of Circe | 1948 |
| Kuttner, Henry | The Odyssey of Yiggar Throlg | 1951 |
| Kuttner, Henry | The Old Army Game (Hogben #1) | 1941 |
| Kuttner, Henry | The Portal in the Picture | 1949 |
| Kuttner, Henry | The Power and the Glory | 1947 |
| Kuttner, Henry | The Prisoner in the Skull | 1949 |
| Kuttner, Henry | The Room of Souls | 1940 |
| Kuttner, Henry | The Salem Horror | 1937 |
| Kuttner, Henry | The Shadow on the Screen | 1938 |
| Kuttner, Henry | The Sky is Falling | 1950 |
| Kuttner, Henry | The Star Parade (Tony Quade #3) | 1938 |
| Kuttner, Henry | The Time Axis | 1948 |
| Kuttner, Henry | The Transgressor | 1939 |
| Kuttner, Henry | The Visitors | 1953 |
| Kuttner, Henry | The Voice of the Lobster | 1950 |
| Kuttner, Henry | The Watcher at the Door | 1939 |
| Kuttner, Henry | The Well of the Worlds | 1952 |
| Kuttner, Henry | The Wolf of Aragon | 1941 |
| Kuttner, Henry | This is the House | 1946 |
| Kuttner, Henry | Thunder in the Dawn | 1938 |
| Kuttner, Henry | Thunder in the Void | 1942 |
| Kuttner, Henry | Time Enough | 1946 |
| Kuttner, Henry | Time Locker | 1943 |
| Kuttner, Henry | Time to Kill | 1940 |
| Kuttner, Henry | Tomorrow and Tomorrow | 1947 |
| Kuttner, Henry | Towers of Death | 1939 |
| Kuttner, Henry | Trophy | 1944 |
| Kuttner, Henry | Tropic Hell | 1941 |
| Kuttner, Henry | Trouble on Titan (Tony Quade #4) | 1947 |
| Kuttner, Henry | Valley of the Flame | 1947 |
| Kuttner, Henry | Vintage Season | 1946 |
| Kuttner, Henry | War-Gods of the Void | 1942 |
| Kuttner, Henry | Way of the Gods | 1947 |
| Kuttner, Henry | We Are the Dead | 1937 |
| Kuttner, Henry | We Kill People | 1946 |
| Kuttner, Henry | We Shall Come Back | 1951 |
| Kuttner, Henry | When the Bough Breaks | 1944 |
| Kuttner, Henry | When the Earth Lived | 1937 |
| Kuttner, Henry | World's End | 1938 |
| Kuttner, Henry | World's Pharaoh | 1939 |
| Kyne, Peter B. | Jim the Conqueror | 1929 |
| Kyne, Peter B. | Never the Twain Shall Meet | 1923 |
| Kyne, Peter B. | The Enchanted Hill | 1924 |
| Kyne, Peter B. | The Tide of Empire | 1928 |
| Kyne, Peter B. | They Also Serve | 1927 |
| La Chance, W. W. | Modern Schoolhouses: With Plans and Illustrations of the Newest in Schoolhouse Architecture | 1919 |
| La Motte-Fouqué, Friedrich de | Undine | 1811 |
| La Prade, Ernest | Alice in Orchestralia | 1941 |
| La Prade, Ernest | Marching Notes | 1929 |
| Lagerlöf, Selma | Charlotte Löwensköld | 1927 |
| Lamb, Harold | Alexander of Macedon | 1946 |
| Lamb, Harold | Marching Sands | 1919 |
| Lamb, Harold | Tamerlane: The Earth Shaker | 1929 |
| Lamb, Harold | The Crusades (Volume 1) Iron Men and Saints | 1930 |
| Lamb, Harold | The Crusades (Volume 2) The Flame of Islam | 1930 |
| Lamb, Harold | The March of the Barbarians | 1940 |
| Lambert, Constant | Music Ho! A Study of Music in Decline | 1931 |
| Lambton, John George | Lord Durham's Report on the Affairs of British North America, Volume 3 | 1912 |
| Lamburn, Richmal Crompton | William Again (Just William #3) | 1923 |
| Lamburn, Richmal Crompton | William and the Tramp (Just William #28) | 1952 |
| Lamburn, Richmal Crompton | William's Happy Days (Just William #12) | 1930 |
| Lamburn, Richmal Crompton | William--In Trouble (Just William #8) | 1927 |
| Lamburn, Richmal Crompton | William--the Bad (Just William #11) | 1930 |
| Lamburn, Richmal Crompton | William--the Bold (Just William #27) | 1950 |
| Lamburn, Richmal Crompton | William--the Conqueror (Just William #6) | 1926 |
| Lamburn, Richmal Crompton | William--the Dictator (Just William #20) | 1938 |
| Lamburn, Richmal Crompton | William--the Pirate (Just William #14) | 1932 |
| Lamburn, Richmal Crompton | William—the Showman (Just William #19) | 1937 |
| Landauer, Gustav | Die Revolution | 1919 |
| Landon, Fred | A Daring Canadian Abolitionist | 1921 |
| Landon, Fred | A Military Tragedy on Lake Erie | 1945 |
| Landon, Fred | Agriculture Among the Negro Refugees in Upper Canada | 1936 |
| Landon, Fred | Amherstburg, Terminus of the Underground Railroad | 1925 |
| Landon, Fred | Anthony Burns in Canada | 1925 |
| Landon, Fred | Benjamin Lundy, Abolitionist | 1927 |