- L'Engle, Madeleine
- L. Kirker, Constance
- LaRue, Dr. Michelle
- LaTeef, Nelda
- Labor, Earle
- Laden, Nina
- Lafort, Alexander
- Lahiri, Jhumpa
- Lai, Remy
- Laing, Olivia
- Laird, Elizabeth
- Lal, Vinay
- Lam, Laura
- Lama, Dalai
- Lama, His Holiness the Dalai
- Lamb, Sandra E.
- Lambdin, Dewey
- Lambert, Brian
- Lambert, Brian
- Lambert, Jennifer K.
- Lambert, Madge
- Lambert-Hurley, Siobhan
- Lambrianou, Chris
- Lancashire, Rachel
- Lancett, James
- Lane, Andrew
- Lane, Mike
- Lang, Andrew
- Lang, Neil
- Lang, Robert J.
- Langa, Mandla
- Lange, Tracey
- Langeland, Deirdre
- Lankester Brisley, Joyce
- Lanza, Robert
- Lara, Andres
- Laraway, Russ
- Large, Annika Le
- Large, Annika Le
- Larkwood, A. K.
- Larsen, Kate
- Larsen, Nella
- Larson, Hope
- Lasky, Dorothea
- Lat
- Lathan, Tom
- Laverne, Lauren
- Lavie, Boaz
- Law, Alice
- Law, Stephen
- Lawler, Janet
- Lawlor, Andrea
- Lawrence, D. H.
- Lawrence, D. H.
- Lawrence, James
- Lawrence, Josie
- Lawrence, Mike
- Lawrence, Patrice
- Lawrence, Sarah
- Lawrence, Sarah
- Lawrence, T. E.
- Lawrence-Lightfoot, Sara
- Lawson, Jenny
- Lawson, Mark
- Le, Stephen
- Leaf, Walter
- Leather, Stephen
- Leblanc, Maurice
- Lebo, Kate
- Ledyard, Addie
- Lee, Alexander
- Lee, Carol Ann
- Lee, Christine
- Lee, Deb JJ
- Lee, Joheun
- Lee, John
- Lee, Lon
- Lee, Sarah
- Lee, Sher
- Lee, Sung-Yoon
- Lee, Suzy
- Lee, Vickie
- Lehane, Lucy
- Leibowitz, Kari
- Leigh, Andrew
- Leilani, Raven
- Leine, Kim
- Leith, Peta
- Leith, Prue
- Lemniscates, Carme
- Lendler, Ian
- Lennon, John
- Lensvelt, Fiona
- Lent, Blair
- Lenton, Steven
- Leon, Donna
- Leonard, M. G.
- Leong, Sloane
- Leopardi, Giacomo
- Leroux, Gaston
- Lesiewicz, Aga
- Lesser, Wendy
- Lester, Adrian
- Lester, George
- Leung, Julie
- Leung, Samantha
- Lev, Gidon
- Levensohn, Melanie
- Levesque, Joanna "JoJo"
- Levin, Charlotte
- Levin, Gabriel
- Levine, Amir
- Levine, Malka
- Levy Frances, Dikla
- Levy, Joanne
- Levy, Marianne
- Lewis, Anthony
- Lewis, C. M.
- Lewis, Caryl
- Lewis, Christian
- Lewis, Cody C.
- Lewis, Damian
- Lewis, Karen
- Lewis, Katherine Templar
- Lewis, Pat
- Lewis, Pat
- Lewis, Sophie R
- Lewis, Stevie
- Lewis, Tess
- Leyh, Kat
- Li, Amanda
- Li, Christina
- Li, Cornelia
- Li, Fei-Fei
- Li, Leesh
- Liang, Ann
- Liang, Holan
- Library, Macmillan Collector's
- Lichtenheld, Tom
- Lieberman, Dr. David J., Ph.D.
- Liew, Sonny
- Liksom, Rosa
- Lin, Liza
- Lin, Rosalie M.
- Linde, K. A.
- Lindemann, Danielle J., PhD
- Lindgren, Astrid
- Lindgren, Minna
- Lindstrom, Carole
- Linnet, Paul
- Linton, Samara
- Lipton, Lenny
- Lipton, Sara
- Lirius, Adelina
- Lis, Lea
- Litchfield, David
- Liu, Dane
- Livingston, Michael
- Llewellyn, Claire
- Lloyd, Ellery
- Lloyd, John
- Lloyd-Rose, Matt
- Lo, Melissa
- Lock, Jon
- Lock, Marianne
- Lockhart, Amy
- Locks, Tim
- Lodge, Jo
- Loewenberg, Lauri
- Loewenstein, Antony
- Lofting, Hugh
- Loftus, David
- Lokko, Lesley
- Lombardi, Kristine A.
- Loncraine, Rebecca
- London, Jack
- London, Jack
- London, Kiara
- Long, Daniel
- Long, Ethan
- Long, Mark
- Long, Meg
- Long, Rachel
- Long, Sarah
- Long, Sarah
- Lopes, Emilie
- Lord, Bethany
- Lord, Emma
- Lord, Walter
- Lotvin, Alan
- Loudon, Mary
- Louis Stevenson, Robert
- Loux, Matthew
- Love, Amanda Darragh
- Lovell, Julia
- Lovett, Courtney
- Lovins, L. Hunter
- Low, William
- Lowe, Daniel
- Lowe, Jaime
- Loxton, Alice
- Loy, Mina
- Loyn, David
- Lu, Marie
- Lubar, David
- Lucas, Evan
- Lucas, Gareth
- Lucas, Rachael
- Lucey, Rory
- Ludwig, Dominique
- Luebbe, Tara
- Luen Yang, Gene
- Lukach, Mark
- Lunabba, Nicolas
- Lush, Edie
- Lutes, Jason
- Lynskey, Dorian
- Lyons, Jenn
- Lyons, Maddox
- López Coto, Laura
- López-Colomé, Pura
- Løvlie, Jenny
- Lüscher, Jonas