Book Series · 15 Books

The Questioneers Books

In order from Iggy Peck, Architect to What's That Color?.

Andrea Beaty and David Roberts's young creators ask big questions, learn from mistakes, and combine science, design, art, and teamwork to solve problems in their community.

Reviewed by the Bookroo Editors Updated

Iggy Peck, Architect
Rosie Revere, Engineer
Ada Twist, Scientist
Rosie Revere and the Raucous Riveters
Ada Twist and the Perilous Pants
Reading order

How to Read the Questioneers Books

This page shows the 15 core books in publication order: seven picture books, seven illustrated chapter-book mysteries, and the first preschool concept book. Younger readers can begin with any picture book; children ready for longer stories should read the numbered chapter books from Rosie Revere and the Raucous Riveters through Lila Greer and the Shrieking Shadow.

ABRAMS also publishes separate Why Files nonfiction readers, Big Project activity books, and Ada Twist, Scientist books based on the Netflix show. Those companion lines expand the same world but are not needed to follow the core books here.

Sources: ABRAMS Questioneers branch list.

For parents

What Parents Should Know

The books celebrate curiosity, persistence, and collaboration without pretending that every experiment or plan works the first time. They also make room for shyness, dyslexia, worry, and different ways of contributing.

The chapter mysteries include manageable suspense—missing pets, a break-in, storms, or a spooky-looking clue—but the friends reason through the problem and adults remain available. There is no graphic violence.

Where the story begins

First Book in the Series

Iggy Peck, Architect
Sale price
$1899
Book #1 · Picture Book · Ages 5–9 · 2007

Iggy Peck, Architect

By Andrea Beaty, David Roberts (Illustrator)

A young boy's passion for building is discouraged by his teacher, but he finds a way to use his skills to help his class in a time of need.

32 pages· 698 words· Est. 6 min read-aloud
5.3/7 Bookroo
$19.99Save 5%
Hardcover
Summary: Iggy Peck loves building, but his talent goes unappreciated by his teacher, Miss Lila Greer. When a field trip takes an unexpected turn, Iggy's architectural skills might just save the day. Can he prove the value of his unique gift and show the power of creativity and teamwork? Join Iggy on this adventure where passion meets practicality, and discover how one child's imagination can make a difference.
In reading order

The Questioneers Series

15 books · Published 2007–2026

#1
Sale price
$1899

Iggy Peck, Architect

Picture Book · Ages 5–9 · 2007

A young boy's passion for building is discouraged by his teacher, but he finds a way to use his skills to help his class in a time of need.

#3
Sale price
$1899

Ada Twist, Scientist

Picture Book · Ages 5–8 · 2016

A young girl's curiosity and love for science lead her to investigate a mysterious smell in her neighborhood.

Companion series

Ada Twist, Scientist: The Why Files Series

5 books · Published 2021–2024

Sale price
$1248

All About Plants!

Chapter Book · Ages 5–8 · 2022

Discover the secrets of plants with Ada Twist. What do they eat? Why do some bloom?

Sale price
$1248

Exploring Flight!

Chapter Book · Ages 5–8 · 2021

Uncover the mysteries of flight with Ada Twist. Why do planes and birds fly? Discover the science behind it all.

Sale price
$1248

Bug Bonanza!

Chapter Book · Ages 5–8 · 2023

Explore the mysteries of bugs with Ada Twist, uncovering why they're vital to our world.

Good to know

Common Questions

How many books are in the Questioneers series?

There are 15 books in the Questioneers series. It began with Iggy Peck, Architect in 2007, and the newest book, What's That Color?, was published in 2026.

What order should you read the Questioneers books in?

Start with Iggy Peck, Architect and follow the series order — the books above are numbered #1 through #15.

What ages are the Questioneers books best for?

The series is best for ages 1–9, based on the age ranges of the individual books.

The people

The Creatives Behind the Books

The people who bring The Questioneers to life.

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