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Cover of Greenwild: The World Behind the Door
Illustrated · ages 8–12

Greenwild: The World Behind the Door

Written by Pari Thomson · Illustrated by Elisa Paganelli

Book 1 of 3 in GreenwildView the full series

Major award winnerBestseller list
Top giftableAdults love it tooEndlessly rereadable

A richly imagined botanical fantasy with a secret green world, a runaway heroine, a feisty cat, and a strong environmental heartbeat. It is one of the strongest recent middle-grade fantasy recommendations for readers who like magic with a nature-protection purpose.

  • Best for8–12
  • FormatIllustrated
  • Length400 pp
  • Read aloud~5 hr40 min
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The vibe

What it’s like.

Style

  • Lyrical
  • Literary
  • Conversational

Tone

  • Adventurous
  • Whimsical
  • Heartwarming
  • Inspirational

Themes

On the pagebotanical magic, secret world, missing mother, plant magic, environmental threat, greenwild, cat companion, hidden door

Experience meters

Energy4/ 5
Humour2/ 5
Scariness2/ 5
Peril3/ 5
Wonder5/ 5
Cosiness3/ 5
Emotional intensity3/ 5
Conceptual intensity3/ 5

What’s it about?

The story.

Daisy Thistledown is searching for her missing mother when she discovers a hidden doorway into the Greenwild, a magical world where plants, people, and impossible natural wonders are bound together. Inside this secret realm she finds danger, friendship, botanical magic, and the possibility that her mother's disappearance is connected to something far bigger than she imagined. With help from other young adventurers and a memorable cat, Daisy must learn who to trust and how to protect a world many people do not even know exists. Pari Thomson's opening Greenwild novel combines the classic thrill of a secret world with a contemporary environmental edge, while Elisa Paganelli's illustrations help give the story a lush, inviting feel. It is magical, page-turning, and emotionally accessible without being lightweight.

Fit check

Right for your child?

Where it lands by age

  • 1
  • 3
  • 5
  • 7
  • 9
  • 11
  • 13
  • Best fit · 8–12
  • Read aloud · 7–12
  • Independent · 8–12

Prose load

Moderate

Visual support

Moderate

Reluctant-reader friendly

Very

Read-aloud quality

Excellent

Works well for

  • Reading aloud
  • Reading together
  • Gift-buying
  • Reluctant readers
Moderate sensitivity3 content warnings

Preview before sharing if a child is sensitive to: absent parent, scary imagery, violence.

Bedtime suitability

3 / 5 · Workable

Sensitive-child

4 / 5 · Good fit

Graphic intensity

1 / 5 · None

Best for

  • Botanical fantasy
  • Secret world
  • Environmental magic
  • Waterstones winner
  • Middle grade read aloud

Avoid if

  • Needs short books
  • Wants gag comedy
  • Prefers realistic school story
  • Sensitive to missing parent

Particularly good for children who are…

  • Making friends
  • Anxiety and worry
  • Interested in science

In the classroom

How it works in school.

A lush, eco-magical adventure series — a great class read-aloud and a companion for environment and nature themes.

Classroom role

  • Classroom library
  • Read aloud
  • Topic companion

A book children love that happens to support school — never a stand-in for the texts a class is taught with. Reviewed for the classroom · June 2026.

Why it lands

Why they love it.

Why kids love it

The specific kick is the door itself — Daisy stepping through an ordinary-looking gap into a wild magical world, the way a nine-year-old reading it suddenly wants to believe their own back garden might do the same. The eco-fantasy that gives the secret-doorway trope its best modern outing.

  • Secret world
  • Magic powers
  • Going on a quest
  • Making a difference
  • Animal companions

Why parents love it

The eco-fantasy series for a child who loved His Dark Materials but isn't quite ready for it — Thomson's secret botanical world, a missing-mother quest, illustrated chapters that hold a young reader. The Greenwild opener earned its early-trilogy comparisons; the next two volumes deliver. Strong gift for a magical-thinking nine-year-old.

  • Beautiful illustrations
  • Conversation starter
  • Great writing
  • Educational for adult too

In the series

Greenwild.

3 books · open the series →

About the creators

About the creators.

PT

Pari Thomson

Writer · United Kingdom

Pari Thomson is a British author best known for the Greenwild middle-grade fantasy series (The World Behind the Door, The City Beyond the Sea, The Forest in the Sky), adventure novels about a girl who discovers a parallel hidden world of plant-magic and ecology. Illustrated throughout by Elisa Paganelli. Thomson's voice is warm, well-paced and environmentally serious, in the Katherine Rundell / Sophie Anderson tradition of richly-imagined middle-grade fantasy. A reliable contemporary UK middle-grade fantasy-adventure author for ages 8–12, particularly for nature-themed fantasy readers.

More from Pari Thomson
EP

Elisa Paganelli

Illustrator · United Kingdom

Elisa Paganelli is an Italian illustrator based in the UK, best known to UK children's-book readers as the visual partner on Pari Thomson's Greenwild middle-grade fantasy series (The World Behind the Door, The City Beyond the Sea, The Forest in the Sky) and on a range of other illustrated middle-grade and picture-book titles. Paganelli's style is bright, painterly and atmospheric, with strong skill at fantasy-world architecture and ensemble character casts. A reliable contemporary illustrator for middle-grade fantasy and adventure books for ages 8–12.

More from Elisa Paganelli

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Last reviewed · May 2026Suggest a correctionHow we recommend

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