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

Worst Week Ever! Wednesday

Written by Eva Amores · Illustrated by Matt Cosgrove

Book 3 of 7 in Worst Week Ever!View the full series

Top giftable

Justin's terrible week goes full desert-island survival on Wednesday: shipwrecked with his arch-enemy, chasing buried treasure and dodging sharks and pirates. Fast, silly cartoon-and-photo comedy for fans of the Treehouse books.

  • 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 pagedesert island, survival, buried treasure, pirates, sharks, rivalry

Experience meters

Energy5/ 5
Humour5/ 5
Scariness2/ 5
Peril3/ 5
Wonder2/ 5
Cosiness1/ 5
Emotional intensity2/ 5
Conceptual intensity1/ 5

What’s it about?

The story.

Justin Chase's cat is still missing, he's an accidental internet sensation, and now he's washed up on a deserted island with the one person he can't stand - his unbelievably annoying arch-enemy Marvin. After being ejected from a plane, the pair drift ashore in an inflatable dinghy and scrawl out an S.O.S., hoping someone spots it soon. There's the tantalising promise of buried treasure somewhere on the island, but instead of riches Justin keeps running into terrifying sharks, petrifying pirates and everything else guaranteed to chill him to the bone. Forced to rely on the enemy he'd happily strand there, Justin has to survive long enough to get rescued. The third book in the globally bestselling day-by-day series is told in the trademark blitz of text, cartoons and photographs - fast, daft and relentlessly funny. Perfect for readers who love Tom Gates, Diary of a Wimpy Kid and the Treehouse books, it's slapstick survival comedy built to keep reluctant readers turning the pages.

Fit check

Right for your child?

Where it lands by age

For 8-11s reading independently, with the visual, joke-packed style keeping it accessible for reluctant readers and confident younger ones. The survival-adventure plot broadens the appeal beyond pure school comedy.

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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
  • Survival adventure
  • Wimpy kid fans

Avoid if

  • Wants gentle bedtime
  • Dislikes gross out humour

Particularly good for children who are…

  • Reluctant reader

Why it lands

Why they love it.

Why kids love it

Shipwrecked on a treasure island with the boy he hates most, Justin has to dodge sharks and pirates while grudgingly teaming up to survive. The survival stakes, the buried-treasure hook and the cartoon chaos make this one of the most exciting days of the week.

  • Surviving danger
  • Adventure and freedom
  • The underdog winning

Why parents love it

The desert-island setting gives this instalment a proper adventure spine while keeping the fast, image-heavy format that reluctant readers love. Harmless peril, a satisfying enemies-forced-together dynamic and jokes on every page.

  • 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.

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.

Last reviewed · July 2026Suggest a correctionHow we recommend

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