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- Munro Leaf
- Robert L. Leahy
- Louisa Leaman
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- Ann Leckie
- Day Leclaire
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- Joseph LeDoux
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- John A. Lee
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- Miranda Lee
- Stan Lee
- Rachel Lee
- Dennis Lee
- Gentry Lee
- Tanith Lee
- James Lee Burke
- Lia Leendertz
- Robert Leeson
- Joseph Sheridan Le Fanu
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- Georges Lefebvre
- William Henry Leffingwell
- Ella Leffland
- Silke Leffler
- Gilles Legardinier
- Lego
- Jacques Le Goff
- Ursula K. Le Guin
- Dennis Lehane
- Justin J. Lehmiller
- Jonah Lehrer
- Fritz Leiber
- Lora Leigh
- Wendy Leigh
- Murray Leinster
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