- Showdown at Gun Hill
- Showdown at Guyamas
- Showdown at Hole-In-the-Wall
- Showdown at Yellow Butte
- Showdown in Dead Man's Canyon
- Shroud
- Shroud of Darkness
- Shroud of Darkness Trilogy Digital Boxset
- Shunned: Dragon's Cord #1 The Metal Veil and the Weeping Sword Named Tear
- Shunned: Dragon's Cord #2 Band Of Dragons
- Shuri Gate
- Shut Up and Ski: Wipeouts, Shootouts and Blowouts on the Trail to the Olympic Dream
- Shuttle
- Shuttle Down
- Shy Angel
- Shégués
- Si par hasard
- Si Pemetik Bintang: Geliat Jago Pedang
- Si'Empra's Queen
- Siam Storm - A Thailand Adventure
- Siam Storm Series
- Siam Storm: A Thailand Adventure - revised 2018
- Siana
- Sibirisches Roulette
- Sibling Rivalry
- Sibrium
- Sibyl's Lord
- Sicarii Justice
- Sicario a zero ore
- Sicilian Sisters
- Sick Heart River (Mountain Meadow)
- Sick love
- Sick Transit
- Sickle
- Sickness of the Night
- Sid X 2
- Side Roads and Dandelions
- Sidekick: Defender Of The City
- Sidespace (Aurora Renegades Book One)
- Sideswiped
- Sidetracked in Silver City
- Sidewinders & Sassy Skirts
- Sidney Sheldon’s After the Darkness
- Sidney Sheldon’s Mistress of the Game
- Sidney Sheldon’s Reckless
- Sidney Sheldon’s The Tides of Memory
- Sidon Charm: The Book of Mysteries
- Sidoriada
- Sidroc the Dane: A Circle of Ceridwen Saga Story
- Sie fielen vom Himmel
- Sie hatten einen Traum
- Sieben glorreiche Western #10
- Sieben Super Western #1
- Sieben Super Western #2
- Siege of Heaven
- Siegfried
- Siegfried Sassoon - The First Complete Biography of One of Our Greatest War Poets
- Sielanka: An Idyll
- Sierra Six
- Siete reinos
- Sievers Trilogy
- Sifting the Sands
- Sight Beyond Sight
- Sightless
- Sigismund Forster
- Sign of the Raven
- Sign of the Throne
- Sign of the Throne: Book One in the Solas Beir Trilogy
- Sign-Talker
- Signa
- Signal from Malta
- SIGNALE
- Significance
- Signor Formica (Fantasy and Horror Classics)
- Signori Briganti
- Signé la grande faucheuse
- Signé Radarax
- Signé, en bas à gauche
- Sikait
- Silas Marner, the Weaver of Raveloe
- Silence
- Silence & Lies (A Short Story)
- Silence - A Tale of the Zombie Apocalypse
- Silence Fallen
- Silencers and Sermons
- Silent As The Grave
- Silent Brand
- Silent Caller
- Silent Craftsman
- Silent Creed