| L'Rae, Carmie | 2 Books | 1 Series |
| La Porta, Monica | 47 Books | 6 Series |
| Labbe, Marguerite | 16 Books | 1 Series |
| Labelle, Jennifer | 24 Books | 3 Series |
| LaCroix, Alyx C. | 1 Book | 1 Series |
| LaCroix, Marianne | 23 Books | 1 Series |
| Ladley, Titania | 31 Books | 1 Series |
| Lady, A. | 11 Books | 3 Series |
| LaFont, Evelyn | 15 Books | 1 Series |
| Lain, Sydney | 24 Books | 4 Series |
| Lain, Tara | 68 Books | 8 Series |
| Laine, Susan | 68 Books | 10 Series |
| Lake, Brair | 12 Books | 2 Series |
| Lake, Ciara | 11 Books | 1 Series |
| Lambo, Amy E. | 6 Books | 1 Series |
| Lamont, Lyndi | 19 Books | 1 Series |
| Lamont, M. Francis | 10 Books | 4 Series |
| Lane, Jourdan | 13 Books | 1 Series |
| Lane, Kallie | 9 Books | 2 Series |
| Lane, Shawn | 105 Books | 1 Series |
| Lane, Tanya | 4 Books | 1 Series |
| Lane, Trina | 27 Books | 2 Series |
| Lang, Chloe | 37 Books | 6 Series |
| Lang, Livia | 32 Books | 1 Series |
| Lang, Stella | 7 Books | 1 Series |
| Langston, K. | 10 Books | 2 Series |
| Lapthorne, Elizabeth | 53 Books | 4 Series |
| Larkin, Kellan | 26 Books | 7 Series |
| LaRocca, Bea | 4 Books | 2 Series |
| LaRose, Jennifer | 5 Books | 1 Series |
| Larose, Mya | 6 Books | 2 Series |
| Lash, Kathleen | 9 Books | 1 Series |
| Latham, D.A. | 10 Books | 1 Series |
| Latroy, Lark | 2 Books | 1 Series |
| Lauryn, Jessica | 12 Books | 2 Series |
| Lawton, Lexi | 14 Books | 1 Series |
| Layne, Devon | 54 Books | 1 Series |
| Layne, Jamaica | 13 Books | 1 Series |
| Lazu, Sotia | 38 Books | 5 Series |
| Leaf, Erin M. | 61 Books | 9 Series |
| Lebel, Amara | 6 Books | 1 Series |
| Lee, Anna | 20 Books | 1 Series |
| Lee, Brenda Stokes | 86 Books | 1 Series |
| Lee, Jessica | 20 Books | 3 Series |
| Lee, Kimball | 24 Books | 4 Series |
| Lee, Liliana | 4 Books | 1 Series |
| Lee, Mandy | 8 Books | 1 Series |
| Lee, Mason | 34 Books | 5 Series |
| Lee, Rebecca | 73 Books | 5 Series |
| Lee, Roz | 54 Books | 4 Series |
| Lee, Sami | 23 Books | 3 Series |
| Lee, Stacy | 20 Books | 4 Series |
| Lee, Trinity | 48 Books | 2 Series |
| Leeland, Jennifer | 34 Books | 3 Series |
| Leigh, Ember | 34 Books | 5 Series |
| Leigh, Jana | 71 Books | 8 Series |
| Leigh, Jenna | 8 Books | 1 Series |
| Leigh, Wendy | 5 Books | 1 Series |
| LeRoux, Lucy | 18 Books | 3 Series |
| Leslie, J.L. | 27 Books | 3 Series |
| Levin, Tabitha | 36 Books | 2 Series |
| Lewis, Lavinia | 24 Books | 3 Series |
| Lewis, Lynn Ray | 15 Books | 1 Series |
| Lewis, Robert J. | 7 Books | 2 Series |
| Leyne, Diane | 31 Books | 5 Series |
| Li, Augusta | 33 Books | 3 Series |
| Liebermann, Jude | 27 Books | 1 Series |
| Linde, Viola | 7 Books | 2 Series |
| Lindke, Eva | 2 Books | 1 Series |
| Linger, Voirey | 10 Books | 1 Series |
| Lipinska, Blanka | 3 Books | 1 Series |
| Lisle, Danielle | 5 Books | 1 Series |
| Liss, K.M. | 25 Books | 9 Series |
| Lister, A.E. | 20 Books | 2 Series |
| Lister, Ashley | 9 Books | 1 Series |
| Littlejohn, Dana | 50 Books | 1 Series |
| Llewellyn, A.J. | 170 Books | 12 Series |
| Llewellyn, A.J.; Manly, D.J. | 64 Books | 7 Series |
| Lloyd, Eliza | 35 Books | 10 Series |
| Logan, Patricia | 59 Books | 5 Series |
| London, Clare | 90 Books | 1 Series |
| London, Mia | 27 Books | 3 Series |
| Long, R.F. | 7 Books | 2 Series |
| Lopez, Lolita | 37 Books | 6 Series |
| Lopez, Melissa | 10 Books | 1 Series |
| Lora Ann | 14 Books | 4 Series |
| Loren, Celia | 17 Books | 3 Series |
| Lorenz, Lynn | 51 Books | 6 Series |
| Lores, Anna | 11 Books | 3 Series |
| Lorraine, Evanne | 31 Books | 4 Series |
| Lory, Ann | 7 Books | 2 Series |
| Louise, Jools | 73 Books | 15 Series |
| Louwe, India-Jean | 5 Books | 1 Series |
| Love, Amy | 9 Books | 3 Series |
| Love, Frankie; Seabrook, Chantel | 29 Books | 7 Series |
| Love, Ivy | 12 Books | 2 Series |
| Love, Virginia | 26 Books | 4 Series |
| Loveling, Daphne | 58 Books | 6 Series |
| Lovell, Christin | 55 Books | 6 Series |
| Lovell, Cooper | 1 Book | 1 Series |
| Lovell, Sally A. | 25 Books | 6 Series |
| Lowe, Elaine | 21 Books | 1 Series |
| Lowe, Heidi | 35 Books | 4 Series |
| Lowe, J.F. | 18 Books | 4 Series |
| Lucas, Rosa | 3 Books | 1 Series |
| Lucas, Samantha | 38 Books | 2 Series |
| Luciani, Kristen | 39 Books | 6 Series |
| Lucille, Kelly | 32 Books | 4 Series |
| Luthor, Lexa | 16 Books | 2 Series |
| Lux, Vivian | 24 Books | 4 Series |
| Lyhne, Meraki P. | 33 Books | 4 Series |
| Lyn, Amylea | 10 Books | 1 Series |
| Lynch, Caitlyn | 22 Books | 2 Series |
| Lynch, Sarah Michelle | 41 Books | 7 Series |
| Lyndon, Sue | 63 Books | 9 Series |
| Lyndon, Sue; Jones, Celeste | 5 Books | 1 Series |
| Lynley, Em | 29 Books | 1 Series |
| Lynn, Grace | 8 Books | 2 Series |
| Lynn, Sandy | 26 Books | 4 Series |
| Lynn, Sui | 12 Books | 2 Series |
| Lynne, Jennifer | 7 Books | 1 Series |
| Lyon, Gwyn R. | 10 Books | 1 Series |
| Lyons, Brenna | 100 Books | 1 Series |
| Lyons, Larissa | 20 Books | 1 Series |
| Lyons, Missy | 33 Books | 5 Series |
| Lyons, Missy; Denis, Cherie | 1 Book | 1 Series |
| Lyons, Perdita | 3 Books | 1 Series |
| Lyons, Rene | 4 Books | 1 Series |