- Silence
- Silence Among Stars
- Silence Between Us Educator's Guide
- Silencio (Saga Hush, Hush 3)
- Silent
- Silent Thunder
- Silver
- Silver and Stone
- Silver Demon
- Silver Eve
- Silver Frost
- Silver Majesty (Bk 2)
- Silver Moon
- Silver Princess (Bk 1)
- Silver Shadows
- Silver Verity (Bk 3)
- Silverdalen
- Silvia y Simón
- Silvie et Simon
- Sim, não, quem sabe
- Simmarflickan
- Simon vs verdens forventninger
- Simon vs. the Homo Sapiens Agenda
- Simple Happiness
- Simplemente, escaparme contigo (Alice y Lucas, una historia de amor 3)
- Sin máscara
- Sinalyna: O Colégio Rosa
- Since We Were Friends
- Sinclair Academy - 01
- Sincronía
- Sinergia
- Sing Sweet Nightingale
- Single Girls
- Single-handed
- Single-minded
- Singled Out
- Singling Out Sable
- Sins of the Innocent: A Novella
- Sins of the Shadow Walkers
- Siren Spell
- Siren's Call: Cursed Seas
- Siren's Fury
- Siren's Song
- Sirenitas
- Sirens
- Sirius of words
- Sisters of Glass
- Sisters of Moonlight
- Sisters of Shadow
- Sisters of Shadow and Light
- Sisters Red
- Sisters' Fate
- Six Days from Sitka
- Six Earlier Days
- Sixteenth Summer
- SKAM Sæson 1, Eva
- Skater Boy
- Skating Through
- Sketch of Secrets (The Garnet Trilogy - Book 1)
- Skid
- Skinny-Dipping
- Sklavin, Kriegerin, Königin (Für Ruhm und Krone – Buch 1)
- Skinny-Dipping
- Sklavin, Kriegerin, Königin (Für Ruhm und Krone – Buch 1)
- Sky Fall
- Sky Tossed
- Sky Without Stars
- Skyggen over stenbænken
- Skyggernes børn
- Skøre hjerter
- Slaaf, Krijger, Koningin (Over Kronen en Glorie—Boek 1)
- Slap af, Dennis og Camilla
- Slave, Warrior, Queen (Of Crowns and Glory—Book 1)
- Slay
- Slayed
- Slayer for Hire
- Sleepaway Girls
- Sleeping Beauty's Spindle
- Sleeping Dragon
- Sleeping Handsome
- Sleepless
- Sleepover with the Enemy
- Slept Away
- Slingshot
- Slip
- Slippers And Thieves
- Slow Echoes
- Slowly Falling
- Small Favors
- Small Gains
- Small is Beautiful
- Small Town Hearts