One More BookFind a book
Cover of Iggy Peck and the Mysterious Mansion
Illustrated · ages 6–9

Iggy Peck and the Mysterious Mansion

The Questioneers Book #3

Written by Andrea Beaty · Illustrated by David Roberts

Book 3 in The QuestioneersView the full series

Top giftable

The third Questioneers chapter book turns architecture-mad Iggy Peck loose in a rambling, supposedly haunted mansion of clashing styles. A gently spooky treasure-hunt mystery solved with knowledge, teamwork and no small amount of nerve.

  • Best for6–9
  • FormatIllustrated
Where to buyPaperback
Amazon
See price at Amazon
Buy

Affiliate links — buy through these retailers and we earn a small commission, at no extra cost to you.

The vibe

What it’s like.

Style

  • Conversational

Tone

  • Funny
  • Warm
  • Suspenseful
  • Whimsical

Themes

On the pagearchitecture, mystery, haunted house, treasure hunt, problem solving

Experience meters

Energy3/ 5
Humour3/ 5
Scariness2/ 5
Peril2/ 5
Wonder3/ 5
Cosiness3/ 5
Emotional intensity2/ 5
Conceptual intensity2/ 5

What’s it about?

The story.

Ada Twist's Aunt Bernice has inherited a sprawling old house from ice-cream mogul Herbert Sherbert—a mansion crammed with rooms built in every architectural style Sherbert ever loved. There's just one problem: everyone says it's haunted, and the priceless antiques meant to pay for its upkeep have vanished. If they can't be found, Aunt Bernice will lose the house forever. It will take all of Iggy Peck's obsessive knowledge of architecture, and the combined talents of fellow Questioneers Rosie Revere, Ada Twist and Sofia Valdez, to sift the creaks and shadows from the clues. Researching the mansion's history, mapping its odd rooms and following the evidence, the friends build suspense toward a mystery with a satisfyingly logical solution. From the bestselling Beaty–Roberts team, this illustrated chapter book folds real architecture into a ghostly whodunit that's just spooky enough. David Roberts's detailed drawings make the mansion a character in its own right, and the diverse, complementary cast of Questioneers shines.

Fit check

Right for your child?

Where it lands by age

Best for 6–9s reading independently, with short chapters and rich illustrations supporting the transition from picture books. Gently spooky rather than frightening, it reads aloud well from about 5, though very bedtime-sensitive children may prefer daytime reading.

  • 1
  • 3
  • 5
  • 7
  • 9
  • 11
  • 13
  • Best fit · 6–9
  • Read aloud · 5–8
  • Independent · 6–9

Prose load

Light

Visual support

High

Reluctant-reader friendly

Very

Read-aloud quality

Strong

Works well for

  • Reading aloud
  • Reading together
  • Gift-buying
  • Reluctant readers
Low sensitivity1 content warning

Preview before sharing if a child is sensitive to: scary imagery.

Bedtime suitability

2 / 5 · Better outside bedtime

Sensitive-child

4 / 5 · Good fit

Graphic intensity

1 / 5 · None

Best for

  • Stem for kids
  • Gentle mysteries
  • Spooky not scary
  • First chapter books

Avoid if

  • Nightmares or fears
  • Wants gentle bedtime

Particularly good for children who are…

  • Interested in science

Why it lands

Why they love it.

Why kids love it

A creaky mansion with secret rooms and missing treasure is catnip for young mystery-lovers, and it's Iggy's nerdy passion for buildings that cracks the case. Just spooky enough to thrill without keeping anyone awake.

  • Being a detective
  • Secret skill
  • Adventure and freedom
  • Friendship and belonging

Why parents love it

The scares are always resolved logically, and real architectural ideas ride along inside the fun. Short chapters and David Roberts's atmospheric illustrations make it an inviting mystery for readers building stamina, with a warm, diverse team at its heart.

  • Educational for adult too
  • Conversation starter

In the series

The Questioneers.

7 books · open the series →

About the creators

About the creators.

AB

Andrea Beaty

Writer · United States

Andrea Beaty is an American children's author and the creator of the Questioneers — the runaway-bestselling series that began with the picture books Iggy Peck, Architect, Rosie Revere, Engineer and Ada Twist, Scientist and grew into a family of illustrated chapter books. A former software engineer who studied biology and computer science, Beaty writes funny, quietly rigorous stories that treat curiosity as a superpower: her young heroes ask questions, make mistakes, gather evidence and try again. Illustrated throughout by David Roberts, the Questioneers champion science, creativity and perseverance with a diverse, complementary cast, and inspired the Emmy-winning Netflix series Ada Twist, Scientist. Beaty's books have become classroom and bedtime staples for children who want to know how the world works.

More from Andrea Beaty
DR

David Roberts

Illustrator · United Kingdom · b. 1970

David Roberts is a British illustrator, born in Liverpool in 1970, who came to children's books after a string of odd jobs and a spell as a milliner — a background that shows in his stylish, spindly, fashion-conscious line. He is best known as the illustrator of Andrea Beaty's multi-million-selling Questioneers, from the Iggy Peck and Ada Twist picture books to the illustrated chapter-book series that follows the same diverse gang of curious, problem-solving children through STEM adventures, gentle mysteries and civic scrapes. His detailed, characterful drawings give each Questioneer a distinct personality and turn settings — a haunted mansion, a stormy night — into characters in their own right. A four-time Kate Greenaway shortlistee, Roberts is one of the most recognisable illustrators in contemporary children's publishing.

More from David Roberts

If you liked this

Three ways out of this book.

If you liked this, try…

Lateral matches. Same shelf, different texture.

Cover of The Bad Guys
The Bad Guys

by Aaron Blabey

Isadora Moon
Harriet Muncaster
Isadora Moon

by Harriet Muncaster

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.

Last reviewed · July 2026Suggest a correctionHow we recommend

More ways to wander the room