Series beginning with L
- Lacey Chronicles
- Lady Grace Mysteries
- Lady Janies Series
- Ladybirds
- Laetitia Rodd Mysteries
- Land of Elyon
- Land of Roar
- Land of Stories
- Larklight
- Last Bear
- Last Comics on Earth
- Last Descendants
- Last Dragon Chronicles
- Last Dragonslayer
- Last Firefox
- The Last Hours
- Last Kids on Earth
- Last Of The Navel Navigators
- Last Stop
- Last Survivors
- Last Wild
- Laura Marlin Mysteries
- Leap Cycle
- Legacy Chronicles
- Legacy of Orisha
- Legend
- Legend of Frog
- Legendeer Trilogy
- Legends of Eerie-on-Sea
- Legends of Orkney
- Legends of the Sky
- Leif the Unlucky Viking
- Lenny Lemmon
- Leo's Map of Monsters
- Leonora Bolt
- Letter for the King
- Level Up
- Leven Thumps
- Leviathan
- Liam Scott
- Libby - Travelling School Mysteries
- Library of Doom
- Library of Doom: The Final Chapters
- Light Thieves
- Lightning Girl
- Like A Charm
- Lily
- Lily at Lissadell
- Lily Quench
- Lionboy
- Listen Up
- Little Animal Rescue
- Little Badman
- Little Grey Men
- Little House Series
- Little Legends
- Little Olympians
- Little Princesses
- Little Women
- Lizzie and Belle Mysteries
- Lizzie and Lucky
- Llama Out Loud!
- Llama United
- Lockwood & Co.
- Lois Lane
- Loki
- Lola and Larch
- Lola Benko
- Lolo
- London Deep
- London Eye Mystery
- London Murder Mysteries
- Lone City Trilogy
- Long Lankin
- Long Lost Secret Diary
- Looking Glass Wars
- Loop
- Looshkin
- Lord of the Rings
- Lori and Max
- Lorien Legacies
- Lorien Legacies Reborn
- Lost
- Lost and Found
- Lost Art Mysteries
- Lost Magician
- Lost Rainforest
- Lost Souls Stories
- Lost Words
- Lost Worlds
- Lottie Biggs
- Lottie Brooks
- Lottie Lipton
- Lottie Luna
- Louis the Laugh
- Louise Trilogy
- Love Like Sky
- Love Sugar Magic
- Love, Lucas
- Love,Lies and Lemon Pies
- Lovegrove Dynasty
- Loving Spirit
- Lucky Bunnies
- Lucky Stars
- Lug
- Luke Challenger
- Lulu Baker Trilogy
- Luma and the Pet Dragon
- Luna Wolf
- Lunar Chronicles
- Lunch Buddies
- Luxe
- Lying Tree
- Lyttle Lies