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Cover of InvestiGators: Take the Plunge
Graphic · ages 7–10

InvestiGators: Take the Plunge

Written and illustrated by John Patrick Green

Book 2 of 9 in InvestiGatorsView the full series

Bestseller listMerchandise
Adults love it too

Mango and Brash are back, this time navigating a water-based mission that takes the series' disaster_survival energy to new depths, literally. Green escalates the peril without losing the puns, and the scariness_level ticks up just enough to feel genuinely tense.

  • 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
  • Suspenseful

Themes

On the pagedetective, alligator, secret agent, water, sewer travel, spy gadget, villain

Experience meters

Energy5/ 5
Humour5/ 5
Scariness2/ 5
Peril2/ 5
Wonder3/ 5
Cosiness2/ 5
Emotional intensity1/ 5
Conceptual intensity2/ 5

What’s it about?

The story.

Take the Plunge sends Mango and Brash into their second case with both the formula confirmed and the stakes raised. The disaster_survival engine replaces the first book's pure mystery structure: the agents find themselves in genuine physical jeopardy, water-based and escalating, which gives the comedy somewhere new to live. Green uses the water setting to expand the visual vocabulary of the series, sewers gave the first book its distinctive look, and the new aquatic terrain gives this one different spatial possibilities. A new villain or threat enters the picture, deepening the FISH (the antagonist organisation whose acronym puns are as elaborate as SUIT's) mythology that will run through the full series. The resilience deep theme (0.55) is new to this book, Mango and Brash have to persist through something that goes more wrong, for longer, than in the origin story. The scariness_level of 2 reflects that the peril feels slightly more consequential without becoming genuinely frightening. Readers who finished the first book and want the series to develop will find it does exactly that; new readers can start here with slightly less context on the duo's dynamic.

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
  • Mystery 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
  • Nightmares or fears

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 kick is the water — Mango and Brash's second case takes them out of their sewer-comfort zone and into proper aquatic peril, with the agents genuinely in trouble for the first time. A seven-year-old who liked book one gets the series escalating exactly as they hoped.

  • Becoming invisible
  • Being a detective
  • Having a nemesis
  • Having a secret base
  • Secret world

Why parents love it

The InvestiGators where the series settles into its proper groove — second case, second villain, the pun-and-plot format clicking together. Best read right after book one to lock the cast in. Slightly higher stakes than the opener, still firmly safe.

  • 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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