Series beginning with T
- The Bromeliad
- The Cousins
- The Day
- The Dead
- The Deep
- The Divide
- The Do-Over
- The Enemy
- The Fallen
- The Gift
- The Last Hours
- The Missing
- The Odds
- The Player's
- The Ropemaker
- The Selection
- The Shapeshifter
- The Smartest Kid in the Universe
- The Squad
- The Swifts
- T.J.
- Tabitha Baird
- Take back the Skies
- Tale of Magic
- Tale of Two Castles
- Tales from Alagaësia
- Tales from Deckawoo Drive
- Tales from Devana High
- Tales from Maple Ridge
- Tales from Schwartzgarten
- Tales From the Badlands
- Tales from the Five Kingdoms
- Tales from the Keep
- Tales from the Sinister City
- Tales from the Wyrd Museum
- Tales of Fayt Trilogy
- Tales of Terror
- Tales of the Dark Forest
- Tales of the Otori
- Tales of the Willows
- Talisman
- Talon Saga
- Tamarind
- Tangled in Time
- Tangshan Tigers
- Tapper Twins
- Tapper Watson
- Tartan of Thyme
- Tarzan
- Task Force Delta
- Tattoo
- Taylor & Rose, Secret Agents
- TBH
- Team Hero
- Team Hero Series 2
- Team Hero Series 3
- Team Hero Specials
- Teardrop Trilogy
- Ted and His Time-Travelling Toilet
- Temple Run. Run for Your Life!
- Terrible Two
- Territory
- Terry, the Torus and the Tumblestones
- Thames and Tide Club
- Thea Stilton
- Theodora Hendrix
- Theodore Boone
- Theodosia
- There's a Dragon
- These Witches Don't Burn
- Thickety
- Thieves Like Us
- Thimble Monkey Superstar
- Thirteen Treasures
- This Woven Kingdom
- Thisby Thestoop
- Thomas Trew
- Thora
- Thorfinn the Nicest Viking
- Thornhill
- Thornthwaite
- Threads
- Three Unlikely Detectives
- Throne of Glass
- Throne of Swans
- Thrones and Bones
- Throwback
- Thursday
- Tiara Club
- Tiara Friends
- Tidemagic
- Tiger at Midnight
- Tiger Days
- Tiger Warrior
- Tillerman Family
- Time After Time
- Time Between Us
- Time Castaways
- Time Hunters
- Time Hunters Saga
- Time Machine Next Door
- Time Master Trilogy
- Time Quake Trilogy
- Time Riders
- Time Rovers
- Time Runners
- Time School
- Time Shifters
- Time Stoppers
- Time Tracers
- Time Travel Diaries
- Time Travel Twins
- Time Travellers
- Time-Travelling Cat
- Timeless
- Timesmith Chronicles
- Timmy Failure
- Tindims
- Tintin
- Tiny Dogs
- Tiny Pretty Things
- Tiny, the Secret Adventurer
- Titans
- To all the Boys Trilogy
- Toby
- Toby and the Pixies
- TodHunter Moon
- Toffle Towers
- Tom Gates
- Tom Marlowe Adventures
- Tom Sawyer
- Tom Swift Inventors' Academy
- Tom Trueheart
- Tombquest
- Tommy Storm
- Tomorrow
- Too Ghoul for School
- Too Much Trouble
- Top of the Pups
- Top-Secret Grandad and Me
- Torrie Quests
- Toto the Ninja Cat
- Touchstone Trilogy
- Tourmaline
- Traces
- Tracy Beaker
- Train to Impossible Places
- Traitor Spy Trilogy
- Trapdoor Mysteries
- The Travels of Ermine (who is very determined)
- Travels with Gannon and Wyatt
- Travis Delaney Investigates
- Treasure Hunters
- Trebizon
- Treehouse Series
- Treekeepers
- Trials of Apollo
- Trinity
- Triplets
- Tripods
- Tripwire
- Triskellion
- Tristan Strong
- Troll
- Troll Hunters
- Trouble at Table 5
- Troublesome Angels
- Troubletwisters
- Truly Devious
- Truth of Things
- Truth Pixie
- Truth Sayer
- Truth, Dare, Kiss or Promise
- Trylle Trilogy
- Tuchus & Topps Investigate
- Tudor Chronicles
- Tuesday McGillycuddy Adventures
- Tumtum and Nutmeg
- Tunnels
- Turbo Racers
- The Twelve
- Twelve Dancing Princesses
- Twice Upon a Time
- Twilight
- Twins
- Twins vs. Triplets
- Twintuition
- Twisted Tree
- Twitch
- Two Dogs in a Trench Coat
- Two Terrible Vikings
- The Worries