Series beginning with W
- W.A.R.P.
- Waiting For Callback
- Wake Trilogy
- Walker
- War Horse
- Warcross
- Wardstone Chronicles
- Warhammer Adventures: Warped Galaxies
- Warlock's Child
- Warlocks of Talverdin
- Warren the 13th
- Warrior Cats
- Warriors Novella
- Warriors Super Edition
- Warriors Trilogy
- Warriors: A Starless Clan
- Warriors: The Broken Code
- Warriors: Dawn of the Clans
- Warriors: The New Prophecy
- Warriors: Omen of the Stars
- Warriors: Power of Three
- Warriors: Vision of shadows
- Watch Hollow
- Watchman William
- Waterfire saga
- Watersong
- Wave Walker
- Wayside School
- We Are Blood And Thunder
- Weather Warden
- Weather Weaver Adventures
- Wednesday Tales
- Welcome to Weirdsville
- Welcome to Wonderland
- Wells of Sorcery Trilogy
- Wendy Quill
- Wereduck
- Wereling
- Wereworld
- Whatever After
- Whatever After - Special Editions
- When I was Joe
- When The World Was Ours
- Where's Wally?
- Which Way to Anywhere
- Whimsy Wood - 1 Posie Pixie 1-7
- Whimsy Wood - 2 Fearne Fairy 8-10
- Whispers of the Gods
- Whitby Witches
- White Cloud Station
- White Fox
- White Giraffe Series
- Who Let the Gods Out?
- Whodunit Detective Agency
- Whole Nother Book
- Wicca
- Wicked Lovely
- Wicked Lovely: Desert Tales
- Wickit Chronicles
- Widdershins Adventures
- Wigglesbottom Primary
- Wild Boy
- Wild Horse Creek Trilogy
- Wild Magic Trilogy
- Wild Rescuers
- Wild Thing
- Wilderlore
- Wildsmith
- Wildwitch
- Wildwood
- Wilf the Mighty Worrier
- Will & His Brothers
- Will Gallows
- Will Solvit
- Will Wilder
- Willa of the Wood
- Willard Price Adventures
- William
- William Popidopolis
- William Wenton (UK titles)
- William Wenton (US titles)
- Willow Wildthing
- Wilma Tenderfoot
- Wind Child
- Wind on Fire
- Wind Riders
- Wind Tamer
- Wing and Claw
- Wingfeather Saga
- Wings
- Wings & Co. Fairy Detective Agency
- Wings of Fire
- Wings of Fire: Legends
- Wings Series
- Winner's Trilogy
- Winners
- Winter Trilogy
- Winterborne Home for Vengeance and Valour
- Wintercraft
- Winterhouse
- Wintry Tales
- Wirrun Trilogy
- Wish
- Wish List
- Wishing Chair
- Wishmakers
- Wishyouwas: The tiny guardian of lost letters
- Witch & Wizard
- Witch Baby
- Witch Child
- Witch of Turlingham Academy
- Witch Trade
- Witch Wars
- Witch's Kiss Trilogy
- Witches of Fairhollow High
- Witchfinder
- Witching Legacy
- Witchlands
- Witchworld
- Witherwood Reform School
- Wizards of Once
- Wolf Springs Chronicles
- Wolf Tower
- Wolfe and Lamb
- Wolfsong
- Wollstonecraft Detective Agency
- Wolven
- Wolves of the Beyond
- Wolves of Willoughby Chase
- Wonder
- Wonder Woman
- Wonderscape
- Wondla Trilogy
- Woodland Magic
- World of Emily Windsnap
- World of Hetty Feather
- World of Norm
- World of Percy Jackson
- World of Skulduggery Pleasant
- World of Warriors
- World's Worst Children
- Worldquake Sequence
- The Worries
- Worst Class in the World
- Worst Week Ever!
- Worzel Gummidge
- Wranglestone
- Wrath and the Dawn
- Wrath of Ambar
- Wren Hunt
- Wrestling Trolls
- Wulfie
- WWF Wild Friends
- Wyrmeweald