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Penguin Random House Children's UK · MMXVIII
Grumpy Monkey
Suzanne Lang
Picture · ages 3–6

Grumpy Monkey

Written by Suzanne Lang · Illustrated by Max Lang

Bestseller list
Top giftableAdults love it tooEndlessly rereadable

A funny, reassuring picture book about being allowed to feel grumpy for no reason at all. Jim the chimpanzee's cranky day is a warm, kid-friendly lesson in emotional literacy that never lectures.

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

The vibe

What it’s like.

Style

  • Conversational
  • Comedic

Tone

  • Funny
  • Warm
  • Gentle
  • Heartwarming

Themes

On the pagegrumpiness, bad mood, big feelings, chimpanzee, emotional literacy

Experience meters

Energy2/ 5
Humour4/ 5
Scariness1/ 5
Peril1/ 5
Wonder1/ 5
Cosiness4/ 5
Emotional intensity2/ 5
Conceptual intensity1/ 5

What’s it about?

The story.

Jim the chimpanzee wakes up in a terrible mood, and he has no idea why. The birds are singing, the sky is blue, and everything in the jungle is beautiful, so why does everything feel so wrong? His well-meaning friends line up with advice: smile, jump around, eat a banana, cheer up. But the more they try to fix him, the grumpier Jim gets, until he finally has a proper meltdown and realises the truth: sometimes you just need to feel your feelings and have a grumpy day. Suzanne Lang's deadpan text and Max Lang's expressive, comic animal cast turn a universal childhood mood into something genuinely funny and quietly liberating. A gentle, hugely popular introduction to emotional literacy, it reassures children (and the adults reading it) that all feelings are allowed, and that a bad mood will pass in its own time.

Fit check

Right for your child?

Where it lands by age

A read-aloud for roughly 3 to 6s, with humour and a gentle emotional-literacy message that adults enjoy too. Early readers of 5 to 7 can manage the short text, but it shines as a shared read for talking about feelings.

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

Prose load

Light

Visual support

Very high

Reluctant-reader friendly

Very

Read-aloud quality

Excellent

Works well for

  • Reading aloud
  • Bedtime
  • 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

4 / 5 · Bedtime-friendly

Sensitive-child

5 / 5 · Good fit

Graphic intensity

1 / 5 · None

Best for

  • Big feelings
  • Emotional literacy
  • Funny read aloud
  • Anger and moods

Avoid if

  • Wants high action
  • Wants plot driven

Particularly good for children who are…

  • Anger management
  • Anxiety and worry

Why it lands

Why they love it.

Why kids love it

Jim is in a foul mood and everyone keeps telling him to cheer up, which is deeply relatable. His big meltdown is very funny, and the reassuring ending, that you are allowed to just feel grumpy sometimes, lands perfectly for children learning about their moods.

  • Being understood finally
  • Friendship and belonging

Why parents love it

A genuinely funny way to tell children that all feelings are allowed and moods pass. The deadpan humour keeps grown-ups smiling on repeat reads, and it hands you the words for talking about bad moods without ever preaching.

  • Shared humour
  • Conversation starter
  • Bedtime appropriate

About the creators

About the creators.

ML

Max Lang

Illustrator

Bio coming soon.

More from Max Lang

If you liked this

Three ways out of this book.

If you liked this, try…

Lateral matches. Same shelf, different texture.

Where to go next…

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

Last reviewed · July 2026Suggest a correctionHow we recommend

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