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Cover of Worst Week Ever! Monday
Illustrated · ages 8–11

Worst Week Ever! Monday

Written by Eva Amores · Illustrated by Matt Cosgrove

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Book 1 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
Where to buyPaperback
WaterstonesIn stock
£7.99
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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.

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  • 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.

EA

Eva Amores

Writer · Australia

Eva Amores is a Filipino-Australian author, designer and photographer, based in Sydney, who co-creates the globally translated Worst Week Ever! series with her husband, the author-illustrator Matt Cosgrove. Born in the Philippines and educated in Australia, she worked in design and photography — including for the Sydney Opera House and the ABC — before turning to children's fiction. Worst Week Ever! chronicles hapless Justin Chase's spectacularly disastrous week one book at a time, told in a manic mash-up of text, cartoons and photographs. Fast, daft and stuffed with slapstick, gross-out gags and running jokes, the seven-part series is built to turn reluctant readers into page-turners, sitting comfortably alongside Diary of a Wimpy Kid, Tom Gates and the Treehouse books. Reliable, high-octane comedy for 8–11s.

More from Eva Amores →
MC

Matt Cosgrove

Writer & illustrator · Australia

Matt Cosgrove is an Australian author-illustrator based in Sydney, best known for the bestselling Macca the Alpaca picture books and, with his wife Eva Amores, the globally translated Worst Week Ever! series. A former magazine creative director with a first-class design degree, Cosgrove brings a slick visual comic energy to Worst Week Ever!, which chronicles Justin Chase's spectacularly disastrous week one day at a time, in a manic mash-up of text, cartoons and photographs. Fast, daft and stuffed with slapstick, gross-out gags and running jokes, the books are built to turn reluctant readers into page-turners, and sit comfortably alongside Diary of a Wimpy Kid, Tom Gates and the Treehouse series. Reliable, high-octane comedy for 8–11s who want laughs on every page.

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
£7.99
Waterstones · 2 shops
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