• The Judas MysteryTerence Copley
• The Jungle of HorrorsJoe Dever
• The Keep of the Lich LordDave Morris, Jamie Thomson
• The King's MissionAllen Sharp
• The Kingdom of WyrdDave Morris, Oliver Johnson
• The Kingdoms of TerrorJoe Dever
• The Kingsport MetamorphosisJonathan Green
• The Knight in Screaming ArmorR.L. Stine
• The Korean WarMichael Burgan
• The Labyrinths of FearDave Morris
• The Lake Monster MysteryShannon Gilligan
• The Last Invasion: 1066Jon Sutherland, Simon Farrell
• The Lazarus PlanJohn Sazaklis
• The League of LaughsMatthew K. Manning
• The Legacy of Craven ManorJoseph Daniels
• The Legacy of VashnaJoe Dever
• The Legend of HiawathaCarol Gaskin
• The Legend of OkiriJose Tamayo Maluenda
• The Legend of the Ancient ScrollMichael Teitelbaum
• The Legend of WeathertopHeike Kubasch
• The Legend of Zelda: Oracle of AgesCraig Wessel
• The Legend of Zelda: Oracle of SeasonsCraig Wessel
• The Legion at WarJ. Andrew Keith, Keith Andren
• The Legion of ShadowMichael J. Ward
• The Little MermaidEric Braun
• The Lord of Shadow KeepOliver Johnson
• The Lost Crowns of Cair ParavelGerald Lientz
• The Lost Gold Of Captain QuicksilverCarol Manners
• The Lost Jewels of NabootiR.A. Montgomery
• The Lost LegionMarc J. Wilson
• The Lost LegionTracey West
• The Lost NinjaJay Leibold
• The Lost PlanetChristopher Black
• The Lost RingGraeme Davis
• The Lost RobotPeter Friend
• The Lost SelfTerence Copley
• The Lost TribeLouise Munro Foley
• The Lost WizardMichael Gray
• The Luckiest Day of Your LifeEdward Packard
• The Mad Mage's AcademyMatt Forbeck
• The Magic CarpetR.G. Austin
• The Magic of the UnicornDeborah Lerme Goodman
• The Magic PathJulius Goodman
• The Magic Top MysteryJane O'Connor, Jim O'Connor
• The Magician's RingCarol Gaskin
• The Making of the Social NetworkMichael Burgan
• The Malifestro QuestSteve Meretzky
• The Malign Mischief of MegaBiteSteve Barlow, Steve Skidmore
• The Marathon Race MysteryJackie Rogers
• The Mardi Gras MysteryLouise Munro Foley
• The Master of MazesCarol Gaskin
• The Masters of DarknessJoe Dever
• The Mayan MysteryKent Keller
• The Mayor's Birthday SurpriseHeather Johnson
• The Melting Pot: An Adventure in New YorkKenneth Roseman
• The Middle AgesAllison Lassieur
• The Mind MasterPhilip Herriot
• The Mines of MalagusViki Llundsbrand
• The Miss Liberty CaperSusan Saunders
• The Missing MagicGareth P. Jones