Mode

kid

parent

Bertie and his dog stumble across a notebook in code on the streets of World War II London. Is the notebook’s owner a spy? Can Bertie and his friends crack the code before something terrible happens?  
Ages 10+
Pages 272
Publisher Penguin Random House
Last Offered Jun 2025

Average Rating

140 Reviews

Featured Reviews

kid avatar

A great story!

Review by Hudson

How I Became a Spy is a great story about WW11 in London. It is also a great book if you want to learn about WW11 and codes and ciphers. You should read this book if you liked the book The Bicycle Spy.

kid avatar

How I Became a Spy by Jordan

Video review by Jordan

Click below to see the video!

How I Became a Spy by Jordan

Reader Reviews

Leave a Review

Leave a Review

Leave a Review

kid avatar

The WWII adventure book

Review by AdamA

How I Became a Spy is a great WWII book filled with adventure and secrets, stopping you at each chapter to solve a riddle. A great book that keeps you on your toes, making you want to skip through the book to know what happens next. Overall a incredible book.

Feb 04, 2026 08:27 PM
kid avatar

I recommend this book

Review by TJT2016

It was awesome and amazing! I really liked it because it was about spies and I really like spies!

Feb 02, 2026 01:27 PM
kid avatar

Amazing story!!!

Review by jdog977

So much investagition and mysteryes.

Jan 06, 2026 09:39 PM
kid avatar

Good Book

Review by runafy

This is a good book.

Jan 02, 2026 06:33 PM
kid avatar

Quite a journey

Review by Bananakid

This is a different kind of mystery story - it's more about how you get to the end than who did it. There are real codes to break along the way, you learn to ask who can be trusted, and a small dog named LR who can save people from bombed out buildings if things get suss. It is cool to read about kids helping win a war and also sad to think about kids having to live through war.

Dec 09, 2025 05:45 PM