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Cover of InvestiGators: Class Action
Graphic · ages 7–10

InvestiGators: Class Action

Written and illustrated by John Patrick Green

Book 9 of 9 in InvestiGatorsView the full series

Bestseller listMerchandise
Adults love it too

Mango and Brash go undercover as students. The fish-out-of-water premise, spy agents in a primary school, delivers the kind of absurdist comedy the series does best, and the legal pun in the title ('class action lawsuit') is one of Green's most layered.

  • Best for7–10
  • FormatGraphic
  • Length224 pp
  • Read aloud~1 hr45 min
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The vibe

What it’s like.

Style

  • Comedic
  • Conversational
  • Onomatopoeic

Tone

  • Funny
  • Silly
  • Exciting
  • Adventurous
  • Absurdist
  • Irreverent
  • Warm

Themes

On the pagealligator, detective, school, undercover student, mascot, classroom chaos, secret agent, pizza day

Experience meters

Energy5/ 5
Humour5/ 5
Scariness1/ 5
Peril2/ 5
Wonder3/ 5
Cosiness3/ 5
Emotional intensity1/ 5
Conceptual intensity2/ 5

What’s it about?

The story.

Class Action is the book where the InvestiGators series turns its formula on its head by putting Mango and Brash into the one environment they are least equipped for: school. The fish_out_of_water engine replaces the usual mystery-from-the-outside structure with something more comic and more uncomfortable, these are trained secret agents navigating cafeteria politics, classroom seating, and presumably pizza day. The mascot surface_topic (0.8) suggests the investigation involves the school's identity or a mascot-related crime, while the undercover_student premise gives Green a new kind of comedy to work with: the agents' extreme competence in spy situations rubbing against their total incompetence in a Year 3 classroom. The belonging deep theme (0.45) appears for the first time in the series and makes sense here, the school setting is the place where belonging is most explicitly tested. The warm tone (replacing suspenseful from earlier books) signals a gentler energy: this is funny in a different register, less about peril and more about social mortification. The starting_school and making_friends reader_situations make this a good recommendation for children anxious about those transitions, the message that even alligator secret agents find school confusing may be more comforting than it sounds.

Fit check

Right for your child?

Where it lands by age

  • 1
  • 3
  • 5
  • 7
  • 9
  • 11
  • 13
  • Best fit · 7–10
  • Read aloud · 6–9
  • Independent · 7–11

Prose load

Light

Visual support

Very high

Reluctant-reader friendly

Very

Read-aloud quality

Strong

Works well for

  • Reading aloud
  • Reluctant readers
Low sensitivityNo content warnings

Nothing in the book is likely to concern most parents. Safe to recommend without preview.

Bedtime suitability

3 / 5 · Workable

Sensitive-child

4 / 5 · Good fit

Graphic intensity

1 / 5 · None

Best for

  • Reluctant readers
  • School story fans
  • Series readers
  • Dog man fans
  • Adventure seekers

Avoid if

No common reasons to avoid this one — a rare clean sweep on the sensitivity flags.

Particularly good for children who are…

  • Reluctant reader
  • Struggling with reading
  • Neurodiversity or learning differences
  • Making friends
  • Starting school

In the classroom

How it works in school.

A pun-filled spy-comic series — a reluctant-reader magnet and classroom-library staple.

Classroom role

  • Classroom library

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 delight is Mango and Brash undercover at school — two trained secret agents trying to navigate Year 3 seating arrangements, school lunch, and pizza day. A seven-year-old reading it gets the satisfying joke of grown-ups (agent grown-ups) being just as confused by school as kids are.

  • Adventure and freedom
  • Becoming invisible
  • Being a detective
  • Having a secret base
  • Making a difference

Why parents love it

The InvestiGators where the agents go undercover at school — the fish-out-of-water comedy of trained spies navigating classroom politics. Quietly useful for a child anxious about starting school or making friends: even alligator agents find this stuff hard. Late-series; doesn't require having read the others.

  • Shared humour
  • Quick to read
  • Conversation starter

In the series

InvestiGators.

9 books · open the series →

About the author & illustrator

John Patrick Green.

JP

John Patrick Green

Writer & illustrator · United States

John Patrick Green is an American author-illustrator best known for the InvestiGators graphic-novel series, a fast, pun-heavy detective comedy starring two alligator agents of S.U.I.T. He also writes and draws the Kitten Construction Company picture books and the Hippopotister graphic novels. Green's style is clean-lined, cartoon-bright and gag-paced, with a strong vocabulary of visual jokes and groan-out-loud wordplay that lands well on read-aloud and gives confident young readers a steady comic engine to chew through. Strong reluctant-reader appeal for ages 6–10, particularly children who already love Dav Pilkey or Aaron Blabey. InvestiGators has been a New York Times bestseller across the run.

More from John Patrick Green

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.

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Last reviewed · April 2026Suggest a correctionHow we recommend

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