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Thea Stilton #1

Thea Stilton and the Dragon's Code

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Geronimo's adventurous sister Thea takes center stage in this super special that's packed with mystery, adventure, and friendship! When Geronimo's sister, Thea, is invited to teach a journalism class at a college on Mouse Island, she has no idea that she's going to be called on to help solve a mystery. But when a student disappears, it's up to Thea and five of her students to find out what happened. A nail-biting mystery ensues, complete with secret passages, underground tunnels, and more than a few surprises along the way. Readers will love following the clues to help Thea and her new friends through their first adventure together!

176 pages, Paperback

First published January 1, 2005

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Thea Stilton

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5 stars
5,124 (54%)
4 stars
2,192 (23%)
3 stars
1,427 (15%)
2 stars
395 (4%)
1 star
219 (2%)
Displaying 1 - 30 of 310 reviews
Profile Image for Bridget.
188 reviews225 followers
April 9, 2022
I NEED TO FIND ALL MY BOOKS AND RE READ THEM
Profile Image for Tal.
308 reviews14 followers
May 19, 2009
i love reading about the sister! yay! i just LOVE that there is SO much more information given in this book about vikings, green tea, dragons, etc! oh! and the kids are given clues and prompts to understand the clues so that they can feel like they are solving the mysteries! such an interesting story!
11 reviews1 follower
Read
January 22, 2016
This book is called Geronimo Stilton and the Dragon's Code by Elisabetta Dami. This a fiction book. Geronimo Stilton and the Dragons Code is a adventure and mystery book. I chose this book because I like the authors books and how she writes books. Elisabetta Dami is an Italian children's fiction writer and the author of books for children. Elisabetta Dami is an Italian children's fiction writer and the author of books for children.

This book is about a mouse named Thea Silton and she needs to teach at a school named Mouseford Academy. In Mouseford Academy she meets some new students of Mouseford Academy how help her find a mouse named Hans Ratson who is actually a teacher of Mouseford Academy. They found out that the teacher was looking for ancient codes. The main characters of this book is Thea, Nicky, Pamela, Paulina, Colette, and Violet. The characters challenge is finding Hans Ratson. Throughout the story all the new students figure out how to not argue, work together, and to not fight. The general plot is Mouseford Academy.The conflict is that Hans Ratson is missing.

The story made me feel interested to read the book. The book was exciting and it made me not stop reading it, eventhough the charaters don't seem real. My favorite part of the book is when they discovered how to find Hans Ratson. I liked the book very much because it was an adventure book. I would recommend this book to all my friend and people. I would give this book a 10 because it is written very well.

801 reviews11 followers
December 15, 2015
I feel bad giving this book only two stars, because I was so clearly not the target audience. So many kids love these books that I wanted to try one, but I did not enjoy the experience. The many sidebars and additional information dumps were distracting and often irrelevant. The constant This is a CLUE! notes were annoying, especially since many of them could not be properly put into context or figured out without more information. I was particularly annoyed that they kept harping on having seen a particular mouse before, which relied on the reader to notice that one cartoon mouse looked similar to another cartoon mouse except for hair color, hair length, glasses, clothes, or pretty much every other visual indicator I was using to differentiate between cartoon mice. The constant changes in color and font of the text was hugely, hugely annoying.

And yet, I know that all of these things that drove me up the wall are huge pluses, sometimes even the number one reason, why kids enjoy the books. I'll keep recommending them to the right age group, but have no intention of reading more myself (until Ivan wants to read them. And then I'll pretend to be having a great time. But I will be lying.)
Profile Image for Heather.
202 reviews9 followers
June 6, 2013
Thea Stilton and the Dragon's Code is a series of books written by Thea, Geronimo's sister. Thea has been asked to return to her old school Mouseford Academy to teach a journalism course to a selected group of students. Excited and intrigued Thea rushes to pack and leave before the weather changes, as she has to sail to the island it is located on, and before school starts in a few days. When she lands on Whale Island she meets 5 young mice and immediately bonds with them, little does Thea know how important these 5 mice will be in solving a mystery before school even starts. Hans Ratson a student at the Academy has gone missing. Strangely enough. The girls start to look for clues with the help of Thea as a guide, but will they be able to find Hans before school starts and to solve the mystery of his random disappearance?

This was a great book. Written in the typical Geronimo Stilton style, Thea's books offer readers the opportunity to help in solving the mystery more by looking for clues and putting the clues together. I also liked the little bits of random information that is offered to the reader about things written or talked about in the book such as information on lightening and how to calculate how far a storm is away from you.
Profile Image for Jessi Jensen.
12 reviews1 follower
January 18, 2012
I have read many Gernimo Stilton Books, But I have never actually read a Thea Stilton Book. For the first Thea book i've read, I would say this book is a page turner! It has so many interesting clues and facts about different things in the book.My favourite part is when they figure out where Hans Ratisson disapeared to. I also love how she puts a little magnafine glass wherever there is a clue. Then later on in the book she puts a box to review the different clues.
Profile Image for maya.
93 reviews
June 2, 2021
I liked the book because the adventures they went on were fun. My favourite part was when they went into the stone dragon's mouth. My favourite character was Thea Stilton because she is smart and kind to her friends.
Profile Image for Hayley Riback.
9 reviews
August 30, 2025
Love the different fonts throughout, very fun. Everything else is pretty bad though.
Profile Image for MrsHamel.
39 reviews7 followers
December 1, 2012
Description: The story of Thea Stilton, Geronimo's sister, and her beginning as a teacher at a boarding school. Her and her new students get right to work trying to solve the mystery of the dragon's code.

Reaction: This was my first attempt at a Stiton book, and I was very disappointed. I found the layout distracting, particularly the way the storyline would move ahead and the next page would feature a picture of a previous scene. I used to suggest these to struggling readers, but I will not do that anymore.

Recommended Level: Intermediate

Subjects/Themes: boarding school, dragon, mystery

Series Information: The first in the series Thea Stilton.
1 review
October 26, 2011
I think this is a great book. I would defently recemend this book to others. It is almost like a mystery book.Oh wate it is a mystery book.I love this book.
56 reviews1 follower
April 21, 2021
Digging up some old childhood memories
Profile Image for Meg Garner.
241 reviews1 follower
September 11, 2023
this was definitely such a nostalgic read for me. i will forever cherish this series no matter my age
Profile Image for Mavis Ros.
550 reviews15 followers
May 1, 2020
“I had a good feeling about these mouselings. I could just tell we were going to hit it off.”

*REREAD at 2020*

This is when I first realize that the Goodreads website didn’t exist the time that I first read a few of my middle-grade books published during my childhood days.

And I would point out that it’s unlikely for Thea here to be this excessive when she senses something’s wrong. Maybe not too much would do much.

Plus, this series changed my life. I would go on and on and write my own fan fiction involving these characters and crossover them with anyone of any genre or story likewise.





Profile Image for Puna Ekka.
35 reviews
October 26, 2023
Technically took me 11 years to finish this book.

Just some thoughts:

In their attempt to make the book inclusive, the book accidentally seems to fetishize the different mice. Not to mention they just stereotype a couple of characters. One of them is French tho so it’s ok.

Also these characters are supposed to be smart but the make an inference call it an “objective observation.”

Having a character with a secret identity is dumb when he doesn’t need one. In fact, he has more power to explore the building with his real identity than his fake one.
Profile Image for Nuria.
7 reviews
January 25, 2023
Este año sólo voy a leer libros escritos por mujeres.
Profile Image for Sarita.
42 reviews3 followers
March 14, 2024
un 3 porque son ratas que odian a los gatos 💋
Profile Image for Sunynsf.
102 reviews10 followers
Read
June 17, 2025
When I was a child I used to read the Geronimo Stilton and the Thea Stilton series. I never really read all parts in the right order. And I longed to read them again.
Profile Image for Marvelous.
114 reviews2 followers
July 18, 2024
Making this review on behalf of the whole Thea Stilton series: they were the original girlbosses. Love this series to bits. Unbridled iconicism. Carried my childhood.
Profile Image for Caelin.
116 reviews1 follower
February 20, 2021
look i know this is a book for little kids, but every buzzfeed quiz i've done tells me that i am an actual child so here we are
also my one brain cell can't handle mysteries any more complicated than this one so it's nice to be able to actually figure stuff out for myself :)
Profile Image for Annika.
66 reviews1 follower
April 7, 2024
I missed them sm 😭😭
Displaying 1 - 30 of 310 reviews

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