Encyclopedias, Almanacs, Transcripts, and Maps
- The Invention of the Microscope
- The Journal of Meteorology
- The Journeys of Marco Polo and Their Impact
- The Khmer Capital at Angkor
- The Knights Templar
- The Legacy of Cave Paintings
- The Legend of Prester John Spurs European Exploration
- The Leopard Men
- The Ley Hunter (Journal)
- The Link
- The Loathly Damsel
- The Lutin
- The Lyceum Banner
- The Macrocosm
- The Macroprosopus
- The Magnetic Compass
- The Manhattan Project and the Decision to Drop the Bomb
- The Marsi
- The Mass Production of Death: Richard Jordan Gatling Invents the Gatling Gun and Sir Hiram Maxim Invents the Maxim Machine Gun
- The Mau-Mau