- Labas, Laura
- Läckberg, Camilla
- Lacrosse, Marie
- Lagercrantz, David
- Lagrange, Pierre
- Lahr, Stefan von der
- Lamballe, Marie
- Lambdin, Dewey
- Landorff, Max
- Landy, Derek
- Lane, Andrew
- Lange, Kathrin
- Lange, Roland
- Langenbach, Clara
- Langer, Siegfried
- Langroth, Ralf
- Lansdale, Joe R.
- Lanz, Fabio
- Lapidus, Jens
- Lark, Sarah
- Larson, Sara B.
- Larsson, Åsa
- Larsson, Stieg
- Lasky, Kathryn
- Lassgard, Magnus
- Laureen, Anne
- Laurens, Stephanie
- Laurin, Ruben
- Lautenschläger, Angela
- Lawhead, Stephen
- Lawrence, Mark
- Laymon, Richard
- Le Guin, Ursula, K.
- Leach, Tim
- Leblanc, Maurice
- LeBor, Adam
- Lee, Geneva
- Lehane, Dennis
- Lehmann, Christine
- Lehmann, Ralf
- Lehtolainen, Leena
- Leibig, Timo
- Leigh, Melinda
- Leiss-Huber, Anton
- Leix, Bernd
- Lénard, Nané
- Lenth, Lars
- Leon, Donna
- Lépic, Alex
- Lerchbaum, Gudrun
- Levenseller, Tricia
- Lewis, C. S.
- Ley, Rosanna
- Liebig, Anna
- Lima, Mario
- Limar, Fiona
- Lind, Hera
- Lindberg, Karin
- Lindell, Unni
- Lindqvist, John Ajvide
- Lindstein, Mariette
- Link, Charlotte
- Lisle, Holly
- Liu, Cixin
- Locke, Attica
- Lode, Christoph
- Lodge, Gytha
- Löffler, Rainer
- Löhnig, Inge
- Lorentz, Iny
- Lorenz, Janina
- Lorne, Mac P.
- Losbohm, Nadja
- Louis, Saskia
- Louko, Eeva
- Low, Robert
- Luca, Matteo De
- Lucas, Emilia
- Lucas, George
- Lüders, Fenja
- Ludlum, Robert
- Ludwig, Stephan
- Lukas, Jana
- Lukianenko, Sergej
- Lumley, Brian
- Luna, Louisa
- Lunde, Maja
- Lupano, Wilfrid
- Lustbader, Eric van
- Lynch, Scott
- Lynds, Gayle
- Lynn, J.
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