• The Library of Turtles and Tortoises
• The Library of the Middle Ages
• The Library of the Nine Planets
• The Library of the Nine Planets (Rosen Publishing Group).
• The Library of the Planets
• The Life & Work Of
• The Life Of
• The Life of Early Civilization Series
• The Light of Nor
• The Lion Storyteller
• The Little Blobs
• The Little Book
• The Little Encyclopedia
• The Little Entrepreneur
• The Little Giant Series
• The Little Rainbow
• The Little Reader Series
• The Living Earth
• The Living Planet
• The Longlight Legacy
• The Looking Glass Wars
• The Looking Glass Wars Trilogy
• The Lorien Legacies
• The Lost Books
• The Lost Chronicles
• The Lost Colony
• The Lost Journals of Ven Polypheme
• The Lost Voices Trilogy
• The Lost Years of Melin bk. 5
• The Lovegrove Legacy
• The Lunar Chronicles
• The Luxe
• The Lynx Series
• The Mad Misadventures of Emmaline and Rubberbones
• The Maeve Chronicles
• The Magic Books
• The Magic Chronicles
• The Magic Library
• The Magic School Bus
• The Magic Shop Book Series
• The Magic of Language
• The Magical Animal Adoption Agency
• The Magical Cycle of the Seasons Series
• The Magical States of America, 1
• The Magician Trilogy
• The Magician's House Series Volume 4
• The Magicians House Quartet, 2
• The Magnolia League
• The Making of a Champion
• The Malichea Quest