Books about Love stories (sorted alphabetically)
- Soldiers of Fortune Richard Harding Davis
- Some builders Amy Le Feuvre
- Song of a Single Note: A Love Story Amelia E. Barr
- Son of the Immortals Louis Tracy
- Sophia: A Romance Stanley John Weyman
- Space-Liner X-87 Ray Cummings
- Space Station 1 Frank Belknap Long
- Spanish Doubloons Camilla Kenyon
- Splendid Outcast George Gibbs
- Squatter and the Don María Amparo Ruiz de Burton
- Squire's Daughter Silas K. Hocking
- star dreamer: A romance Egerton Castle and Agnes Castle
- Starken: Ein Athleten-Roman (German) Dolorosa
- Stars Incline Jeanne Judson
- Stella Rosevelt : A novel Mrs. Georgie Sheldon
- Story of Venus and Tannhäuser: A Romantic Novel Aubrey Beardsley
- strange people Murray Leinster
- Street of Seven Stars Mary Roberts Rinehart
- Stufe (German) Franziska Mann
- Suitors of Yvonne: being a portion of the memoirs of the Sieur Gaston de Luynes Rafael Sabatini
- Summer Edith Wharton
- Summer Edith Wharton
- Sunny Slopes Ethel Hueston
- Surprising Adventures of Sir Toady Lion with Those of General Napoleon Smith S. R. Crockett
- Susan Ernest Oldmeadow