Authors
- Klavan, Andrew (also known as: Keith Peterson)
- Koenig, Joseph
- Langton, Jane
- Lansdale, Joe
- Lariar, Lawrence
- Latimer, Jonathan
- Law, Janice
- Leblanc, Maurice
- Leroux, Gaston
- Leuci, Bob
- Lewin, Elsa
- Link, William
- Lippman, Laura
- Lockridge, Frances and Richard
- Loomis, Gregg
- Lovesey, Peter
- Lowndes, Marie Belloc
- Macdonald, Ross (also known as: Kenneth Millar)
- MacLeod, Charlotte (also known as: Alisa Craig)
- Marlowe, Stephen
