Series beginning with S
- S*W*A*G*G
- S.O.S. Adventure
- S.T.A.G.S.
- S.T.E.A.L.T.H.
- S.W.I.T.C.H Insects
- S.W.I.T.C.H Reptiles
- Saddle Island Trilogy
- Sadie Rocks
- Sadiq
- Saga of Darren Shan
- Saga of Larten Crepsley
- Saga of Roland Inness
- Sal and Gabi
- Sally in the City of Dreams
- Sally Jones - Murderous Ape
- Sally Lockhart
- Salt Trilogy
- Sam Silver Undercover Pirate
- Sam Swann's Movie Mysteries
- Sam Wu
- Samantha Spinner
- Sammy Feral's Diaries of Weird
- Sammy Keyes
- Samurai Wars
- Sands of Arawiya
- Sandy Lane Stables
- Sarai Gonzalez
- Sasquatch and Aliens
- Sausage Dog Santa
- Savants
- Savvy
- Sawbones
- Saxby Smart, Private Detective
- Scarlet and Ivy
- Scarlet Silver
- Scarlett
- Scarlett Fife
- Scavenger
- School for Good and Evil
- School for Stars
- School Friends
- School of Fear
- School of Night
- School Ship Tobermory
- Scoop McLaren
- Scotland Stars F.C. (Football Club)
- Scrap
- Scream Street
- Screaming Sands
- Scribble Witch
- Sea Horses
- Sea Keepers
- Sea Quest
- Sea Quest Specials
- Sea Witch
- Searchlight
- Seaview Stables Adventures
- Sebastian Darke
- Secret
- Secret Agent Mummy
- Secret Agents Jack and Max Stalwart
- Secret Beast Club
- Secret Breakers
- Secret Circle
- Secret Cooking Club
- Secret Detectives
- Secret Diary - National Trust
- Secret Dragon
- Secret Explorers
- Secret Kingdom
- Secret Kingdom (Series 2)
- Secret Kingdom (Series 3)
- Secret Kingdom (Series 4)
- Secret Kingdom (Series 5)
- Secret Kingdom (Series 6)
- Secret Kingdom (Series 7)
- Secret Mermaid
- Secret Ninja Spies
- Secret of Glendunny
- Secret Princesses
- Secret Rescuers
- Secret Series
- Secret Seven
- Secret Spy Society
- Secrets at St Jude's
- Secrets Club
- Secrets of Bearhaven
- Secrets of the Immortal Nicholas Flamel
- Secrets of the Seven
- Secrets of the Tombs
- Section 13
- Sedric
- Seeds of America Trilogy
- Seeker
- Seekers
- Seekers of the Wild Realm
- The Selection
- Septimus Heap
- Serafina
- Seraphina
- Series of Unfortunate Events
- Serpent and Dove
- Sesame Seade
- Seth Seppi Mystery
- Seven Citadels
- Seven Fabulous Wonders
- Seven Kingdoms Trilogy
- Seven Realms
- Seven Sorcerers
- Seven Wonders
- Seventh Tower
- Shad Hadid
- Shades of London
- Shadow Children
- Shadow Cipher
- Shadow Falls
- Shadow Game Series
- Shadow House
- Shadow Magic
- Shadow Of The Fox
- Shadow of the Dragon
- Shadow of the Wall
- Shadow Skye
- Shadow Squadron
- Shadow Weaver
- Shadowforest
- Shadowhall Academy
- Shadowmagic
- Shadowmancer
- Shadowshaper Cypher
- The Shapeshifter
- Shark Island
- Shark Wars
- Shatter Me
- Shattered Realms
- Shattered Sea Trilogy
- Sherlock Bones
- Sherlock Holmes Children's Collection
- Sherlock Holmes's Baker Street Boys
- Sherlock Sam
- Shift
- Shifty McGifty and Slippery Sam
- Shiloh
- Shine!
- Ship of Shadows
- Shipley Manor
- Shipwreck Island
- Shiver Point
- Shiver Trilogy
- Shooting Kabul
- Shop of Impossible Ice Creams
- Shouty Kid
- Show Stopper
- Shrinking Violet
- Shrunk!
- Sight
- Silk Sisters Trilogy
- Silver Arrow
- Silver Brumby
- Silver Hand
- Silver Jaguar Society Mysteries
- Silver Sequence
- Silver Street Farm
- Silverlake Fairy School
- Silverwing
- Simon Snow
- Simone
- Sin Eater's Daughter
- Sinclair's Mysteries
- Sing Like No One's Listening
- Siren Trilogy
- Sisterhood of the Travelling Pants
- Sisters Grimm
- Sisters of Glass
- Six of Crows
- Sixth-Grade Alien
- Sixties Trilogy
- Skandar
- Skate School
- Skating School
- Skeleton Keys
- Skellig
- Skulduggery Pleasant
- Skull Cat
- Sky Chasers
- Sky Fall Trilogy
- Sky Horses
- Sky Pirates
- Sky Thieves
- Skylark Trilogy
- Skylarks' War
- Skyriders
- SkyWake
- Slamdown Town
- Slapshots
- Slated
- Slayer
- Sleepovers
- Slime Squad
- Sloth Sleuth
- Sluggers
- Small Spaces
- Small Tales from the Big Forest
- Small Vampires
- The Smartest Kid in the Universe
- Smells Like Dog
- Smidgens
- Smiler Trilogy
- Smoke Thieves
- Snow Spider Trilogy
- Snow White Trilogy
- Snow-Walker
- Snowdonia Chronicles
- Soccer Diaries
- Soccer Sisters
- Soccer Squad
- Soldier Dogs
- Solve Your Own Mystery
- Somersaults and Dreams
- Something Wickedly Weird
- Sona Sharma
- Song of the Lioness
- Songbird Cafe Girls
- Songs of Magic
- Sophie
- Sophie and the Shadow Woods
- Sophie Books
- Soul Hunters
- Soul Mates
- Soul Screamers
- Soul Seekers
- Space Band
- Space Blasters
- Space Detectives
- Space Hoppers
- Space Lizards
- Space Penguins
- Space Pirates
- Space Rocks!
- Spaceheadz
- Spacejackers
- Spangles McNasty
- Spark
- Sparkle Dragons
- Sparkleton
- Sparky - Mrs Mothwick's Magic Academy
- Spartan Warrior
- Spartapuss
- Special Agents
- Special Forces
- Special Forces Cadets
- Special Operations
- Spectaculars
- Spell Series
- Spell Sisters
- Spellbound Ponies
- Spellcaster
- Spellcasters
- Spellslinger
- Spiderwick Chronicles
- Spike
- Spindlewood
- Spirit Animals
- Spirit Hunters
- Spirit Riding Free
- Spiritstone Saga
- Splintered Trilogy
- Spook School
- Spook's Apprentice: Brother Wulf
- Spooked
- Spooksmiths Investigate
- Sports Academy
- Sprinkle Sundays
- Spud
- Spy Dog
- Spy Girl
- Spy High
- Spy High - Series Two
- Spy Master
- Spy Mice
- Spy Penguins
- Spy Pups
- Spy School
- Spy Toys
- Spyglass Sisterhood
- The Squad
- Squad
- Squire
- Squishy McFluff
- St Clare's
- St Grizzle's School for Girls
- St Viper's School for Super Villains
- St. Rosetta’s Academy
- Stadium School
- Stan
- Stan Stinky
- Star Boy
- Star Dancer
- Star Fighters
- Star Friends
- Star Makers Club
- Star Switch
- Star Wars: Adventures in Wild Space
- Star Wars: The Clone Wars Decide Your Destiny
- Star Wars: Jedi Apprentice
- Starblade Chronicles
- Starbound Trilogy
- Starburster Stories
- Starcrossed
- Stardust
- Starfell
- Stargirl
- Stargirl Academy
- Stargold Chronicles
- Starlight Academy
- Starlight Stables Gang
- Starters
- Stay Alive
- Steampunk Chronicles
- Steel Trap
- Stella & Marigold
- Stella Etc
- Stella Street
- Stevie Silver
- Stick and Fetch Investigate
- Stick Boy
- Stick Cat
- Stick Dog
- Sticky Pines
- Stinetinglers
- Stink
- Stink Worst Fairy Ever
- Stinkbomb and Ketchup-Face
- Stinky and Jinks - My Hamster
- Stitch Head
- Stitch Head Graphic Novel
- Stolen Dreams
- Stone Rider
- Stoneheart
- Stonewylde
- STORM
- Storm Keeper Trilogy
- Storm Runner
- Storm Witch
- Story Shop
- Story Thieves
- Stranded
- Strange Angels
- Strangeworlds Travel Agency
- Stravaganza
- Street Child
- Strictly Come Dancing
- Striker Boy
- Strong Winds
- Stuart
- Study
- Stuntboy
- Sugar and Spice
- Summer Camp Secrets
- Summer I Turned Pretty
- Summer Stories
- Summoner
- Sundered Lands
- Sunny
- Sunshine Simpson
- Sunshine Stables
- Super Cats
- Super Cute
- Super Max
- Super Secret Super Spies
- Super Sidekicks
- Super Soccer Boy
- Super Weird! Mystery
- Super-Secret Diary of Holly Hopkinson
- Super-Serious Mysteries
- Supercat
- Supergirl
- Superhumans
- Supernatural Society
- Superpets!
- Superpowers
- SuperQuesters
- Supersaurs
- Superstar High
- Survival Squad
- Survivor Diaries
- Survivors
- Survivors: The Gathering Darkness
- Surya Trilogy
- Suzy P
- Swallowcliffe Hall
- Swallows and Amazons
- Swan House Ballet School Mystery
- SWARM
- Swarm rising
- Sweet Evil
- Sweet Hearts
- Swidgers
- Swift and Hawk
- The Swifts
- Swim the Fly
- Switch Up
- Switchers Trilogy
- System Divine