- Illustrated Chapter Books
- Ages 7–10
- Comedy
The Bad Guys in The Baddest Day Ever
Book 10 of 20 in The Bad GuysView the full series
A big-feeling tenth episode that acts like a season finale for the early Bad Guys arc. It is still very funny and accessible, but has more climactic energy than the earliest mission books.
- Best for7–10
- FormatIllustrated
- Length176 pp
- Read aloud~1 hr10 min
The vibe
What it’s like.
Style
- Conversational
- Comedic
- Onomatopoeic
Tone
- Funny
- Silly
- Irreverent
- Exciting
- Suspenseful
Themes
Experience meters
What’s it about?
The story.
The Baddest Day Ever brings the early Bad Guys escalation to a loud, dramatic comic climax. The team have survived rescue missions, evil genius plots, zombie kittens, aliens, dinosaurs and identity crises, but now everything feels as if it is crashing together. Mr Wolf, Mr Snake, Mr Shark and Mr Piranha are still ridiculous, still panicky and still not always good at being good, yet the stakes around their friendship and heroism feel bigger than they did at the start. Aaron Blabey keeps the book highly readable through short bursts of text, bold panels and immediate jokes, but this episode has a stronger sense of payoff for children who have read the previous books. It is best treated as the end of the first major run: silly, fast and accessible, but more satisfying when the reader understands how far the gang has come.
Fit check
Right for your child?
Where it lands by age
- 1
- 3
- 5
- 7
- 9
- 11
- 13
- Best fit · 7–10
- Read aloud · 6–10
- Independent · 7–11
Prose load
Light
Visual support
Very high
Reluctant-reader friendly
Very
Read-aloud quality
Strong
Works well for
- Reading aloud
- Reading together
- Reluctant readers
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
2 / 5 · Mild
Best for
- Dog man fans
- Captain underpants fans
- Reluctant readers
- Series payoff
- Fast reads
Avoid if
- Prefers calm books
- Needs realistic stories
- Needs standalone books
Particularly good for children who are…
- Reluctant reader
- Struggling with reading
In the classroom
How it works in school.
The wildly funny Bad Guys series — a legendary reluctant-reader hook and classroom-library staple.
A book children love that happens to support school — never a stand-in for the texts a class is taught with. Reviewed for the classroom · June 2026.
Why it lands
Why they love it.
Why kids love it
The specific weight is everything going wrong — Marmalade's plans accelerating, the team's powers misfiring, friendships fracturing under pressure. A reader who's followed the gang gets the satisfying middle-act low point where stakes feel real. Sets up the next arc.
- Adventure and freedom
- Breaking the rules safely
- Making a difference
- Surviving danger
Why parents love it
The Bad Guys where the series lets things go properly wrong — middle-act low point, friendships under strain, the cast on the back foot for an entire volume. Best read in sequence; functions as the stake-raiser before the bigger second arc gets going.
- Shared humour
- Quick to read
- Conversation starter
In the series
The Bad Guys.
20 books · open the series →
About the author & illustrator
Aaron Blabey.
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.
Buy or borrow
Pick up a copy.
- Bookshop.org ↗
- Waterstones ↗
- Amazon UK ↗
- Hive ↗
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