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Cover of Colin's Monster
Picture · ages 3–6

Colin's Monster

Written and illustrated by Holly Swain

Part of Colin'sView the full series

Part of the Colin universeOpen the collection

Top giftableAdults love it tooEndlessly rereadable

A forthcoming third Colin and Duck story that sends the pair into the castle dungeon after a mysterious noise. It looks like the spookiest entry so far, but still in a comic, low-scare picture-book register.

  • Best for3–6
  • FormatPicture
  • Length32 pp
  • Read aloud~6 min
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The vibe

What it’s like.

Style

  • Conversational
  • Comedic
  • Onomatopoeic

Tone

  • Funny
  • Silly
  • Suspenseful
  • Warm

Themes

On the pagemonster, dungeon, duck, vegetarian vampire, strange noise, castle, comic suspense

Experience meters

Energy4/ 5
Humour5/ 5
Scariness2/ 5
Peril1/ 5
Wonder2/ 5
Cosiness3/ 5
Emotional intensity1/ 5
Conceptual intensity1/ 5

What’s it about?

The story.

Colin and Duck are back at the castle, and this time something is making a very strange noise. They search from top to bottom, discovering rooms they have never seen before and probably several they wish they had never entered. Eventually there is only one place left to look: the dungeon. But Colin and Duck have never been inside the dungeon, and nobody knows what, or who, is waiting there. Colin's Monster continues Holly Swain's funny, visually busy Colin and Duck series, turning a spooky castle setup into a comic mystery for young children. The premise has suspense, monsters and dungeon imagery, but the series' established tone suggests more giggles than genuine fright. It should work especially well as a Halloween-season read-aloud.

Fit check

Right for your child?

Where it lands by age

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

Prose load

Light

Visual support

High

Reluctant-reader friendly

Very

Read-aloud quality

Excellent

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

3 / 5 · Workable

Sensitive-child

4 / 5 · Good fit

Graphic intensity

1 / 5 · None

Best for

  • Funny read aloud
  • Halloween but not scary
  • Comic mystery
  • Monster story
  • Series continuation

Avoid if

  • Has not read earlier books
  • Very sensitive to monsters
  • Needs post publication validation

Particularly good for children who are…

  • Making friends
  • Nightmares or fears

In the classroom

How it works in school.

A warm, funny picture-book series — a lovely read-aloud about friendship, family and accepting others.

Classroom role

  • Read aloud
  • Discussion and empathy

Good for teaching

  • Character motivation

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

  • Being a detective
  • Surviving danger
  • Friendship and belonging
  • Breaking the rules safely

Why parents love it

  • Shared humour
  • Beautiful illustrations
  • Quick to read
  • Conversation starter

In the series

Colin's.

3 books · open the series →

About the author & illustrator

Holly Swain.

HS

Holly Swain

Writer & illustrator · United Kingdom

Holly Swain is a British author-illustrator best known for the Colin picture-book series (Colin's Castle, Colin's Monster, Colin's Grandma, Colin's Christmas), gentle, character-driven picture books following a small boy named Colin through small but emotionally rich situations. Swain's style is bright, warmly cartoony and character-led, with strong read-aloud rhythm. She also illustrates extensively for other UK picture-book and educational publishers. A reliable contemporary UK picture-book maker for ages 2–6 in the gentle-everyday-emotional register.

More from Holly Swain

If you liked this

Three ways out of this book.

If you liked this, try…

Lateral matches. Same shelf, different texture.

Come into this from…

Easier or preparing reads — perfect lead-ins.

Where to go next…

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

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Where you’ll find it

On these reading lists.

Buy or borrow

Pick up a copy.

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

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