Reading order
| # | Title | Published | Author | Buy on Amazon |
|---|---|---|---|---|
| 1 | Thea Stilton and the Dragon’s Code | 2009 | Geronimo Stilton: Thea Stilton | Buy |
| 2 | Thea Stilton and the Mountain of Fire | 2009 | Geronimo Stilton: Thea Stilton | Buy |
| 3 | Thea Stilton and the Ghost of the Shipwreck | 2010 | Geronimo Stilton: Thea Stilton | Buy |
| 4 | Thea Stilton and the Secret City | 2010 | Geronimo Stilton: Thea Stilton | Buy |
| 5 | Thea Stilton And The Mystery In Paris | 2010 | Geronimo Stilton: Thea Stilton | Buy |
| 6 | Thea Stilton and the Cherry Blossom Adventure | 2011 | Geronimo Stilton: Thea Stilton | Buy |
| 7 | Thea Stilton and the Star Castaways | 2011 | Geronimo Stilton: Thea Stilton | Buy |
| 8 | Big Trouble in the Big Apple | 2011 | Geronimo Stilton: Thea Stilton | Buy |
| 9 | Thea Stilton and the Ice Treasure | 2011 | Geronimo Stilton: Thea Stilton | Buy |
| 10 | Thea Stilton and the Secret of the Old Castle | 2012 | Geronimo Stilton: Thea Stilton | Buy |
| 11 | Thea Stilton and the Blue Scarab Hunt | 2012 | Geronimo Stilton: Thea Stilton | Buy |
| 12 | Thea Stilton and the Prince’s Emerald | 2012 | Geronimo Stilton: Thea Stilton | Buy |
| 13 | Thea Stilton and the Mystery on the Orient Express | 2012 | Geronimo Stilton: Thea Stilton | Buy |
| 14 | Thea Stilton and the Dancing Shadows | 2013 | Geronimo Stilton: Thea Stilton | Buy |
| 15 | Thea Stilton and the Legend of the Fire Flowers | 2013 | Geronimo Stilton: Thea Stilton | Buy |
| 16 | Thea Stilton and the Spanish Dance Mission | 2013 | Geronimo Stilton: Thea Stilton | Buy |
| 17 | Thea Stilton and the Journey to the Lion’s Den | 2013 | Geronimo Stilton: Thea Stilton | Buy |
| 18 | Thea Stilton and the Great Tulip Heist | 2014 | Geronimo Stilton: Thea Stilton | Buy |
| 19 | Thea Stilton and the Chocolate Sabotage | 2014 | Geronimo Stilton: Thea Stilton | Buy |
| 20 | Thea Stilton and the Missing Myth | 2014 | Geronimo Stilton: Thea Stilton | Buy |
| 21 | Thea Stilton and the Lost Letters | 2015 | Geronimo Stilton: Thea Stilton | Buy |
| 22 | Thea Stilton and the Tropical Treasure | 2015 | Geronimo Stilton: Thea Stilton | Buy |
| 23 | Thea Stilton and the Hollywood Hoax | 2016 | Geronimo Stilton: Thea Stilton | Buy |
| 24 | Thea Stilton and the Madagascar Madness | 2016 | Geronimo Stilton: Thea Stilton | Buy |
| 25 | Thea Stilton and the Frozen Fiasco | 2017 | Geronimo Stilton: Thea Stilton | Buy |
| 26 | Thea Stilton and the Venice Masquerade | 2017 | Geronimo Stilton: Thea Stilton | Buy |
| 27 | Thea Stilton and the Niagara Splash | 2018 | Geronimo Stilton: Thea Stilton | Buy |
| 28 | Thea Stilton and the Riddle of the Ruins | 2018 | Geronimo Stilton: Thea Stilton | Buy |
| 29 | The Phantom of the Orchestra | 2019 | Geronimo Stilton: Thea Stilton | Buy |
| 30 | Black Forest Burglary | 2019 | Geronimo Stilton: Thea Stilton | Buy |
| 31 | Race for the Gold | 2020 | Geronimo Stilton: Thea Stilton | Buy |
| 32 | The Rainforest Rescue | 2020 | Geronimo Stilton: Thea Stilton | Buy |
| 33 | The American Dream | 2021 | Geronimo Stilton: Thea Stilton | Buy |
| 34 | A Roman Holiday | 2021 | Geronimo Stilton: Thea Stilton | Buy |
| 35 | Fiesta in Mexico | 2022 | Geronimo Stilton: Thea Stilton | Buy |
| 36 | Cave of Stars | 2023 | Geronimo Stilton: Thea Stilton | Buy |
| 37 | The Ghost of The Woods | 2024 | Geronimo Stilton: Thea Stilton | Buy |
The Geronimo Stilton: Thea Stilton series began in 2009 with Thea Stilton and the Dragon’s Code and has grown to 37 books as of The Ghost of The Woods in 2024. Each book sends the five Thea Sisters to a different country or city to solve a mystery, with settings that range from Japanese cherry blossom festivals to the Orient Express to the Venice Masquerade.
The books follow a reliable format: a new location, a puzzle or crime to solve, and plenty of friendship and teamwork along the way. Titles like The Great Tulip Heist, The Chocolate Sabotage, and Black Forest Burglary give a good sense of the series’ light, adventure-focused tone. The colorful text formatting and illustrations that define the Geronimo Stilton brand are present throughout.