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HarperCollins Children's Books · MMXXII
Into the Sideways World
Ross Welford
Chapter · ages 9–12

Into the Sideways World

Written and illustrated by Ross Welford

Part of the Ross Welford universeOpen the collection

A twisty parallel-world adventure in which two friends slip into a cleaner, kinder version of their own town and race to prove it is real before war engulfs the world they left behind. Vintage Welford: a huge sci-fi idea wrapped around ordinary kids and a real-world message about climate and conflict.

  • Best for9–12
  • FormatChapter
  • Length416 pp
  • Read aloud~5 hr55 min

The vibe

What it’s like.

Style

  • Conversational

Tone

  • Exciting
  • Thought provoking
  • Suspenseful
  • Warm

Themes

On the pageparallel worlds, climate change, war, mysterious creature

Experience meters

Energy4/ 5
Humour3/ 5
Scariness2/ 5
Peril3/ 5
Wonder4/ 5
Cosiness2/ 5
Emotional intensity3/ 5
Conceptual intensity4/ 5

What’s it about?

The story.

When twelve-year-olds Willa and Manny hear rumours of a strange animal prowling their North East town, they set out to prove it exists. Following the creature into a cave one full-moon night, they are swept into an alternate, better version of their own world – one where pollution and conflict were solved decades ago, and even their families seem happier. But when they cross back, no one believes a word of it. And with a global war looming in their own world, their hunt for proof of the Sideways World becomes a desperate, ticking-clock quest. Ross Welford spins another high-concept adventure that folds climate change and the shadow of pandemic into a genuinely gripping story, without ever losing the ordinary, funny voices of two kids in over their heads. Fast, inventive and quietly hopeful, it argues that a better world is possible – and that noticing it is the first step to building it.

Fit check

Right for your child?

Where it lands by age

Aimed squarely at 9–12s, working equally well read independently or aloud. The concept stretches confident younger readers, while the climate-and-conflict backdrop gives older ones plenty to think and talk about.

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  • Best fit · 9–12
  • Read aloud · 9–12
  • Independent · 9–12

Prose load

Moderate

Visual support

Low

Reluctant-reader friendly

Workable

Read-aloud quality

Workable

Low sensitivityNo content warnings

Nothing in the book is likely to concern most parents. Safe to recommend without preview.

Bedtime suitability

2 / 5 · Better outside bedtime

Sensitive-child

3 / 5 · Mostly fine

Graphic intensity

2 / 5 · Mild

Best for

  • Sci fi adventure
  • Parallel worlds
  • Environmental themes

Avoid if

  • Wants light bedtime

Particularly good for children who are…

  • Interested in science

Why it lands

Why they love it.

Why kids love it

Slipping through a cave into a cleaner, happier version of your own town is an irresistible what-if, and Willa and Manny are ordinary kids you root for. The ticking-clock chase to prove the Sideways World is real keeps the pages flying.

  • Secret world
  • Making a difference
  • Adventure and freedom
  • Surviving danger

Why parents love it

Welford threads climate change and conflict through a gripping parallel-world adventure that never lectures. It hands young readers a genuinely hopeful argument – that a better world is possible – and makes a natural springboard for talking about the environment.

  • Conversation starter

About the author

Ross Welford.

If you liked this

Three ways out of this book.

If you liked this, try…

Lateral matches. Same shelf, different texture.

When We Got Lost in Dreamland
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When We Got Lost in Dreamland

by Ross Welford

The Kid Who Came from Space
Ross Welford
The Kid Who Came from Space

by Ross Welford

Where to go next…

Escalation reads — a step up in scale, silliness, or stakes.

The Monkey Who Fell from the Future
Ross Welford
The Monkey Who Fell from the Future

by Ross Welford

Last reviewed · July 2026Suggest a correctionHow we recommend

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