Spy Books for Kids · 333 titles considered

The Best Spy Books for Kids

By the Bookroo Editors
Updated August 1, 2026

Every child already knows the essential skill. Stand very still, keep your face ordinary, and listen to the grown-ups talk as though you were a lamp. Spy stories simply hand that instinct a code name, a notebook, and something enormous to lose — a stolen spoon, a school full of impostors, a war that turns on one false message delivered to the right general.

Drawing from Bookroo’s collection of 333 spy books, our editors chose thirteen that give young readers real tradecraft rather than sunglasses and a trench coat: surveillance that goes wrong, disguises that nearly hold, codes worth breaking, and true agents whose reports changed what happened next. Start with the fixed shortlist, then browse picture books for read-aloud missions and chapter books for readers ready to run their own operation.

Mac Undercover
#1 in Series
The Shortlist

Our 13 Favorite Spy Books for Kids

Sale price
$1899
Picture Book · Ages 4–8 · 2012

Secret Agent Splat!

By Rob Scotton · Splat the Cat series

Splat’s father’s duck decoys keep disappearing and coming back without their beaks. Splat goes undercover.

40 pages· 586 words· Est. 5 min read-aloud
Best for
A first spy story for the preschool crowd
3.9/5 Goodreads · 671 ratings
$19.99Save 5%
Hardcover
Graphic Nov.
Sale price
$1697
Picture Book · Ages 4–8 · 2018

Lyric McKerrigan, Secret Librarian

A villain announces he will destroy every book on earth. The world’s finest librarian goes in alone, armed with paperbacks.

40 pages· 492 words· Est. 6 min read-aloud
Best for
Read-aloud spy comedy for ages 4–8
4.1/5 Goodreads · 1,037 ratings
$17.99Save 6%
Hardcover
Picture Book · Ages 7–11 · 2016

A Spy Called James

By Anne Rockwell, Floyd Cooper (Illustrator)

James Lafayette walked into the British camp as a servant and walked out with Cornwallis’s plans.

32 pages
Best for
The true Revolutionary War spy behind Yorktown
4.1/5 Goodreads · 459 ratings
$19.99Save 5%
Hardcover
Chapter Book · Ages 7–10 · 2018

Mac Undercover

By Mac Barnett, Mike Lowery (Illustrator) · Book #1 in the Mac B., Kid Spy series

The Queen of England telephones a boy in California. Her Crown Jewels are missing, and she would like Mac to handle it.

160 pages· 10,469 words· Est. 1.5 hour read
Best for
The newly independent reader’s first spy series
4.2/5 Goodreads · 2,452 ratings
$12.99Save 4%
Hardcover
Chapter Book · Ages 8–12 · 1964

Harriet the Spy

Harriet M. Welsch spies on her whole neighborhood and writes down exactly what she thinks — until her classmates find the notebook.

300 pages· 57,761 words· Est. 8 hour read
Best for
The classic that invented the kid spy
4.0/5 Goodreads · 101,191 ratings
$8.99Save 5%
Paperback
Chapter Book · Ages 8–12 · 2012

Spy School

By Stuart Gibbs · Book #1 in the Spy School series

Ben Ripley is recruited to a CIA academy hidden behind a science school. He is a terrible spy and an excellent target.

290 pages· 60,641 words· Est. 8.5 hour read
Best for
Hooking a reluctant reader on a long series
4.1/5 Goodreads · 38,748 ratings
$9.99Save 4%
Paperback
Chapter Book · Ages 8–12 · 2020

City Spies

By James Ponti · Book #1 in the City Spies series

A teenage hacker facing juvenile detention is instead recruited to an MI6 team of five young agents based in Scotland.

378 pages· 64,521 words· Est. 9 hour read
Best for
Team-based missions with real fieldcraft
6.0/7 Bookroo·4.3/5 Goodreads · 18,795 ratings
$19.99Save 5%
Hardcover
Chapter Book · Ages 8–12 · 2006

Stormbreaker

By Anthony Horowitz · Book #1 in the Alex Rider series

Alex Rider’s uncle dies in a car crash with fourteen bullet holes in the windscreen. MI6 would like Alex to take his place.

352 pages· 47,739 words· Est. 6.5 hour read
Best for
Older readers who want the action turned all the way up
4.0/5 Goodreads · 110,473 ratings
$9.99Save 4%
Paperback
Chapter Book · Ages 8–13 · 2007

The Mysterious Benedict Society

Four children answer a newspaper ad, pass a series of very strange tests, and are sent undercover into a school with no rules.

The E.B. White Read Aloud Award (2008)
485 pages· 117,838 words· Est. 13 hour read
Best for
Puzzle lovers who want a long, layered mission
7.0/7 Bookroo·4.2/5 Goodreads · 179,176 ratings
$9.99Save 4%
Paperback
Chapter Book · Ages 8–12 · 2012

One Dead Spy

Nathan Hale, about to be hanged as a spy in 1776, stalls his executioner by narrating the entire Revolutionary War.

128 pages· 14,156 words· Est. 2.5 hour read
Best for
Graphic-novel readers and history skeptics
4.2/5 Goodreads · 7,581 ratings
$15.99Save 6%
Hardcover
Chapter Book · Ages 9–12 · 2012

Liar & Spy

Georges’s odd new neighbor recruits him into a spy club with one target: the man in apartment 4C.

180 pages· 38,480 words· Est. 4.5 hour read
Best for
A quieter, more literary take on surveillance
3.8/5 Goodreads · 26,979 ratings
$15.99Save 6%
Hardcover
Chapter Book · Ages 8–12 · 2024

Max in the House of Spies

Sent alone from Berlin to London in 1939, eleven-year-old Max talks his way into British intelligence to get back to his parents.

320 pages· 58,636 words· Est. 8 hour read
Best for
Readers ready for a wartime mission with real stakes
4.1/5 Goodreads · 2,738 ratings
$18.99Save 5%
Hardcover
Chapter Book · Ages 10–14 · 2012

Bomb

Three simultaneous stories: building the atomic bomb, stealing it for the Soviets, and sabotaging the German effort in Norway.

304 pages· 60,357 words· Est. 6.5 hour read
Best for
The nonfiction capstone for ages 10 and up
4.1/5 Goodreads · 21,537 ratings
$17.99Save 6%
Paperback
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Browse by age

Spy Picture Books & Secret-Agent Read-Alouds

Stakeouts in the backyard, disguises made of dish towels, and short true stories of real agents — missions for ages 3–8.

Josephine Baker

Ages 4–7 · 2018

A dancer defies segregation, captivates Paris, and becomes a spy.

The Scarlet Stockings Spy

Ages 6–9 · 2004

In war-torn Philadelphia, a young girl becomes a spy, risking everything for freedom.

Code Breaker, Spy Hunter

Ages 7–12 · 2021

A cryptologist unravels codes to dismantle spy rings and save lives.

Nurse, Soldier, Spy

Ages 6–9 · 2011

A woman disguises as a man to fight and spy in the Civil War.

Henry and Mudge and the Sneaky Crackers

Ages 5–7 · 1998

A boy and his dog uncover a coded message. Is another spy nearby?

Secret, Secret Agent Guy

Ages 4–8 · 2021

A young spy's bedtime mission faces an unexpected twist.

Phoebe the Spy

Ages 8–12 · 1977

A young spy races to thwart a plot against George Washington before it's too late.

Olivia the Spy

Ages 3–7 · 2017

A pig's eavesdropping reveals a birthday surprise that could change everything.

City of Secrets

Ages 8–12 · 2020

A shy orphan guards a city's secret, pursued by rogues in a mysterious building.

Secret Agent

Ages 4–8 · 2020

A spy cat uncovers a mysterious message and goes undercover to solve a case.

Spy Guy

Ages 4–7 · 2015

Can a clumsy spy uncover the secret to stealth?

Undercover Ostrich

Ages 4–9 · 2019

Uncover the mystery of sneaky ostriches and a hidden peanut mission.

View all spy picture books
Browse by age

Spy Chapter Books & Middle Grade Espionage

Spy academies, undercover teams, wartime couriers, code rooms, and gadget-heavy missions for independent readers ages 6–11.

InvestiGators
#1 in Series
Graphic Nov.
Sale price
$1299

InvestiGators

Ages 7–10 · 2020

A group of alligator investigators solve a mystery involving a missing chef, a stolen scientific invention, and a triceratops escape artist.

Mrs. Smith's Spy School for Girls

Ages 9–13 · 2017

A girl must master spy skills to find her missing mother.

Toliver's Secret

Ages 7–11 · 1976

A young girl must navigate a treacherous journey to deliver a secret message to a tavern owner in a small town.

The Journal of William Thomas Emerson

Ages 9–12 · 1998

A boy becomes a spy amidst pre-Revolutionary War tensions.

Spy School British Invasion

Ages 9–12 · 2019

Young spies must outwit a global threat with a mysterious key.

Escape

Ages 8–12 · 2020

Two kids flee across Europe after a failed plot to kill Hitler.

Europa

Ages 8–12 · 2026

Spies race to stop a criminal's escape and prevent attacks across Europe.

War Games

Ages 8–12 · 2025

An Olympic gymnast uncovers a dark secret in 1936 Berlin, risking everything to thwart a sinister plot.

Code Name Kingfisher
Sale price
$1899

Code Name Kingfisher

Ages 8–12 · 2024

A girl uncovers her grandmother's secret past in the Dutch Resistance, revealing hidden family ties and wartime bravery.

The Faithful Spy

Ages 10–14 · 2018

A pastor risks everything to stop Hitler's rise.

Code Name 711

Ages 8–12 · 2013

A young spy must stop a presidential assassination and uncover a legendary coat's secret.

The Hunt for the Yeti Skull

Ages 6–9 · 2011

A missing plane, a Yeti skull, and a daring mountain rescue.

Keep exploring
Books about detectivesMystery and detective storiesCodes, ciphers, and puzzlesBooks about espionageGoing undercoverSpy schoolsBooks about disguisesBooks about secret societiesBooks about secretsThe American RevolutionBooks about World War IIAdventure stories

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