Books about Man-woman relationships -- Fiction (sorted alphabetically)
- Knock three-one-two Fredric Brown
- Kotkan tie (Finnish) Ethel M. Dell
- Kuninkaitten kuningas (Finnish) H. G. Wells
- Laakson lilja: Maaseutuelämän kuvaus (Finnish) Honoré de Balzac
- Lady Barbarity: A Romance J. C. Snaith
- Lady Chatterley's lover D. H. Lawrence
- Lady Into Hell-Cat Stanley Mullen
- Lady Lilith Stephen McKenna
- Lady of Rome F. Marion Crawford
- Lancelot Biggs, Master Navigator Nelson S. Bond
- Langs lijnen van geleidelijkheid (Dutch) Louis Couperus
- Last Call: A Romance (Vol. 1 of 3) Richard Dowling
- Last Call: A Romance (Vol. 2 of 3) Richard Dowling
- Last Call: A Romance (Vol. 3 of 3) Richard Dowling
- last crash Kenneth Latour
- Last Run on Venus James McKimmey
- Last Two Alive! Alfred Coppel
- Latter-Day Sweethearts Mrs. Burton Harrison
- Laugh Maker James Oliver Curwood
- Law Inevitable Louis Couperus
- Lawton Girl Harold Frederic
- Lay Anthony: A Romance Joseph Hergesheimer
- Less than kin Alice Duer Miller
- Letter of the Contract Basil King
- Letters of Two Brides Honoré de Balzac