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

Worst Week Ever! Sunday

Written by Eva Amores · Illustrated by Matt Cosgrove

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

Top giftable

The cataclysmic finale to the day-by-day series: on Sunday an alien invasion arrives and the fate of the entire planet somehow rests on hapless Justin Chase's shoulders. Fast, silly, cartoon-and-photo comedy that pays off the running alien-abducted-cat gag.

  • 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 pagealien invasion, saving the world, aliens, missing pet

Experience meters

Energy5/ 5
Humour5/ 5
Scariness2/ 5
Peril3/ 5
Wonder3/ 5
Cosiness1/ 5
Emotional intensity2/ 5
Conceptual intensity1/ 5

What’s it about?

The story.

Justin Chase has endured a truly biblical week - a mortifying Monday, a tumultuous Tuesday, a wild Wednesday, a terrible Thursday, a freefalling Friday and a zombie-infested Saturday. Just when he's certain nothing could possibly top all that, along comes Sunday and a catastrophic alien invasion, with the fate of the entire planet resting - improbably, disastrously - on Justin's shoulders. It turns out his cat being abducted by aliens back on Monday may not have been such a wild theory after all. Billed as the cataclysmic conclusion to the global hit series, this seventh and final book brings the week to a suitably enormous, world-saving climax while keeping the trademark riot of text, cartoons and photographs. Fast, daft and packed with slapstick, it's perfect for fans of Tom Gates, Diary of a Wimpy Kid and the Treehouse books. The relentless visual comedy and short bursts of text make it a reliable page-turner for reluctant readers - and a big, satisfying payoff for anyone who's followed Justin all week.

Fit check

Right for your child?

Where it lands by age

For 8-11s reading independently, with the visual, joke-packed format keeping it accessible for reluctant readers and confident younger ones. As the finale it lands best after the earlier books, but the alien-invasion romp still stands up on its own.

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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
  • Alien 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

The week ends with the biggest disaster of all - an alien invasion where saving the entire planet is somehow down to Justin. It finally explains the abducted cat, and the sky-high stakes plus cartoon chaos make this the most epic, satisfying day of the lot.

  • Surviving danger
  • The underdog winning
  • Making a difference

Why parents love it

The world-saving climax pays off the whole week, including the running alien-cat gag, giving readers who've followed Justin a proper sense of an ending. Still fast, image-heavy and harmless - an easy recommend for a reluctant reader nearing the finish line.

  • 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

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Easier or preparing reads — perfect lead-ins.

Last reviewed · July 2026Suggest a correctionHow we recommend

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