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Cover of Super Happy Magic Forest and the Deep Trouble
Illustrated · ages 6–9

Super Happy Magic Forest and the Deep Trouble

Written and illustrated by Matty Long

Book 3 of 4 in Super Happy Magic Forest Chapter BooksView the full series

Part of the Super Happy Magic Forest universeOpen the collection

Top giftableEndlessly rereadable

The Super Happy Magic Forest crew are going underwater, and the ocean is even more chaotic than the forest. The third chapter book takes the gang somewhere completely new and is the series at its most visually inventive.

  • Best for6–9
  • FormatIllustrated
  • Length192 pp
  • Read aloud~2 hr45 min
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The vibe

What it’s like.

Style

  • Conversational
  • Comedic
  • Onomatopoeic

Tone

  • Funny
  • Silly
  • Exciting
  • Adventurous
  • Whimsical
  • Absurdist
  • Irreverent

Themes

On the pageunderwater world, hero team, magic forest, merpeople, quest, fantasy joke

Experience meters

Energy5/ 5
Humour5/ 5
Scariness2/ 5
Peril2/ 5
Wonder5/ 5
Cosiness2/ 5
Emotional intensity2/ 5
Conceptual intensity2/ 5

What’s it about?

The story.

Something has gone wrong, and the only solution involves going underwater. Blossom, Gumball, Trevor, Herbert, and Hoofius find themselves beneath the waves, in a world of merpeople, sea creatures, and underwater mysteries that turns out to have just as many problems as the forest they came from, only wetter. Matty Long's third chapter book is the most visually distinctive entry in the chapter book series, taking full advantage of the underwater setting for a completely different colour palette and a new set of visual jokes. The cast of underwater characters adds fresh comedy dynamics while the familiar group continues to be its excellent, bickering, occasionally competent self. The self-acceptance thread in this book, around one character's particular insecurity and how the group responds, is lightly handled but adds slightly more emotional weight than the earlier entries. Best read in sequence.

Fit check

Right for your child?

Where it lands by age

  • 1
  • 3
  • 5
  • 7
  • 9
  • 11
  • 13
  • Best fit · 6–9
  • Read aloud · 5–9
  • Independent · 6–9

Prose load

Moderate

Visual support

High

Reluctant-reader friendly

Very

Read-aloud quality

Strong

Works well for

  • Reading aloud
  • Reading together
  • Gift-buying
  • Reluctant readers
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

4 / 5 · Good fit

Graphic intensity

2 / 5 · Mild

Best for

  • Laugh out loud
  • Reluctant readers
  • Visual comedy
  • Gift book
  • Gateway chapter book

Avoid if

No common reasons to avoid this one — a rare clean sweep on the sensitivity flags.

Particularly good for children who are…

  • Reluctant reader
  • Struggling with reading
  • Interested in art and creativity
  • Making friends
  • Low self esteem

In the classroom

How it works in school.

A funny fantasy-quest series — a reluctant-reader pleaser and classroom-library staple.

Classroom role

  • Classroom library

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 delight is underwater chaos — the forest gang plunged below the waves, merpeople and sea creatures and seaweed, the same five misfits trying to be heroes in a completely wrong setting. The Super Happy Magic Forest where everyone gets wet.

  • Secret world
  • Adventure and freedom
  • Magic powers
  • Surviving danger

Why parents love it

The Super Happy Magic Forest underwater volume — fresh palette, merpeople, the established ensemble navigating somewhere completely new. Useful for a child mid-series who wants the world to expand. Visual density at maximum.

  • Shared humour
  • Nostalgia
  • Conversation starter
  • Quick to read

In the series

Super Happy Magic Forest Chapter Books.

4 books · open the series →

About the author & illustrator

Matty Long.

ML

Matty Long

Writer & illustrator · United Kingdom

Matty Long is a British author-illustrator best known for the Super Happy Magic Forest series, irreverent, joke-saturated comic picture books / chapter-comic hybrids about a band of cheerful fantasy creatures (a unicorn, a fairy, a slug, a faun) on increasingly silly quests. Long's style is bright, panel-led, gag-heavy and densely visual, with running jokes for adult readers underneath. The series is a reliable bridge for kids moving from picture books into longer comic-format reading, with strong reluctant-reader pull for ages 5–9. Long also illustrates a range of other picture books and works in animation. A great gateway author for funny-bone children not yet ready for Bone or Hilo.

More from Matty Long

If you liked this

Three ways out of this book.

If you liked this, try…

Lateral matches. Same shelf, different texture.

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Super Happy Magic Forest and the Portals of Panic

by Matty Long

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Dog Man

by Dav Pilkey

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Jamie Smart
Bunny vs Monkey

by Jamie Smart

Come into this from…

Easier or preparing reads — perfect lead-ins.

Cover of Super Happy Magic Forest and the Portals of Panic
Super Happy Magic Forest and the Portals of Panic

by Matty Long

Bunny vs Monkey
Jamie Smart
Bunny vs Monkey

by Jamie Smart

Where to go next…

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

Buy or borrow

Pick up a copy.

  • Bookshop.org
  • Waterstones
  • Amazon UK
  • Hive
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Last reviewed · June 2026Suggest a correctionHow we recommend

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