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Simon & Schuster Children's UK · MMXXIII
Worst Week Ever! Monday
Eva Amores
Illustrated · ages 8–11

Worst Week Ever! Monday

Written by Eva Amores · Illustrated by Matt Cosgrove

Book 1 of 7 in Worst Week Ever!View the full series

Top giftable

The riotous, photo-and-cartoon-packed opener to the day-by-day comedy series about Justin Chase, an unlucky kid whose first day at a new school spirals from bad to catastrophic. Frantic, gross and very funny — catnip for reluctant readers who love Diary of a Wimpy Kid.

  • Best for8–11
  • FormatIllustrated
  • Length192 pp
  • Read aloud~1 hr15 min

The vibe

What it’s like.

Style

  • Comedic
  • Conversational

Tone

  • Funny
  • Silly
  • Irreverent
  • Absurdist
  • Exciting

Themes

On the pagestarting a new school, embarrassment, bullies, toilet humour, blended family, missing pet

Experience meters

Energy5/ 5
Humour5/ 5
Scariness1/ 5
Peril2/ 5
Wonder2/ 5
Cosiness1/ 5
Emotional intensity2/ 5
Conceptual intensity1/ 5

What’s it about?

The story.

Meet Justin Chase, a boy convinced he is having the Worst Week Ever. On Monday his mum drops him at his dad's house on the way to her honeymoon with a new husband Justin is sure is a vampire, his dad drives a giant toilet on wheels and is on a green-food-only health kick, his sweary crocheting Nan has moved in, and his beloved cat has vanished (abducted by aliens, obviously). Then there's the first day at his new school, where a bully makes his life a misery and swimming class ends with Justin dangling off a ten-metre diving tower in nothing but a rapidly unravelling crocheted swimsuit. Told in a manic mash-up of text, cartoons and photographs, this is the launch of the globally bestselling seven-part series — one book for each day of a truly disastrous week. Fast, daft and packed with slapstick and toilet humour, it's built for readers who devour Tom Gates, Diary of a Wimpy Kid and the Treehouse books, and it turns even the most reluctant reader into a page-turner.

Fit check

Right for your child?

Where it lands by age

Pitched at 8-11s reading independently, with the visual, joke-a-page format making it very friendly for reluctant readers and confident readers as young as seven or eight. It works read aloud but really shines as a book a child devours alone.

  • 1
  • 3
  • 5
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  • Best fit · 8–11
  • Read aloud · 7–10
  • Independent · 8–11

Prose load

Light

Visual support

Very high

Reluctant-reader friendly

Very

Read-aloud quality

Workable

Works well for

  • 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

3 / 5 · Mostly fine

Graphic intensity

1 / 5 · None

Best for

  • Reluctant readers
  • Funny disaster comedy
  • Toilet humour
  • Wimpy kid fans

Avoid if

  • Wants gentle bedtime
  • Dislikes gross out humour

Particularly good for children who are…

  • Reluctant reader
  • Starting school
  • Being bullied
  • New step parent or blended family

Why it lands

Why they love it.

Why kids love it

Justin's Monday is a non-stop pile-up of gross, mortifying catastrophes, from a vampire stepdad to a swimsuit that unravels in front of the whole class. The manic mix of cartoons, photos and short bursts of text makes every page a laugh and a dare to keep going.

  • The underdog winning
  • Surviving danger
  • Breaking the rules safely

Why parents love it

The relentless visual comedy and bite-sized text carry even the most reluctant reader through a whole book, and the day-by-day hook keeps them coming back for the next one. It's harmless slapstick with a likeable underdog hero.

  • Shared humour
  • Quick to read

In the series

Worst Week Ever!.

7 books · open the series →

About the creators

About the creators.

MC

Matt Cosgrove

Writer & illustrator

Bio coming soon.

More from Matt Cosgrove

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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