Book Series · 8 Books

Thea Stilton Graphic Novel Books

In order from The Secret of Whale Island to The Thea Sisters and the Secret Treasure Hunt. Part of Geronimo Stilton.

The Secret of the Waterfall in the Woods

Where the story begins

First Book in the Series

Graphic Nov.

Sale price

$958

Book #1 · Chapter Book · Ages 7–11 · 2013

The Secret of Whale Island

By Thea Stilton

A killer whale disrupts college life, threatening peace during whale migration.

56 pages· 5,314 words· Est. 1 hour read

$9.99Save 4%

Summary: At Ratford College, the Thea Sisters, five aspiring journalists, face an unexpected challenge as a killer whale threatens the annual whale migration. Amidst classes and friendships, can they uncover the truth and restore peace to Whale Island? Dive into a thrilling adventure where the stakes are high, and the mystery deepens with every wave.

In reading order

Thea Stilton Graphic Novel Series

8 books · Published 2013–2017

Graphic Nov.

Sale price

$958

The Secret of Whale Island

Chapter Book · Ages 7–11 · 2013

A killer whale disrupts college life, threatening peace during whale migration.

Graphic Nov.

Sale price

$958

Revenge of the Lizard Club

Chapter Book · Ages 7–11 · 2013

A mysterious ship threatens an election and the island's future.

Graphic Nov.

Sale price

$958

The Treasure of the Viking Ship

Chapter Book · Ages 7–11 · 2014

A sunken Viking ship's treasure is at risk. Can young journalists save it from a mysterious thief?

Graphic Nov.

Sale price

$958

Catching the Giant Wave

Chapter Book · Ages 7–11 · 2014

A surfing club ignores storm warnings, facing a giant wave's wrath.

Graphic Nov.

Sale price

$958

The Secret of the Waterfall in the Woods

Chapter Book · Ages 7–11 · 2016

Five students tackle mysteries at Mouseford Academy.

Graphic Nov.

Sale price

$958

The Thea Sisters and the Mystery at Sea

Chapter Book · Ages 7–11 · 2016

Turtles vanish, oil threatens, and mysteries unfold on Turtle Island.

Graphic Nov.

Sale price

$958

A Song for the Thea Sisters

Chapter Book · Ages 7–10 · 2017

A band competition turns tense as sabotage threatens the Thea Sisters' chance to shine.

The Thea Sisters and the Secret Treasure Hunt

Graphic Nov.

Sale price

$958

The Thea Sisters and the Secret Treasure Hunt

Chapter Book · Ages 7–11 · 2017

A storm scatters treasure hunters, revealing the true treasure within.

Good to know

Common Questions

How many books are in the Thea Stilton Graphic Novel series?

There are 8 books in the Thea Stilton Graphic Novel series. It began with The Secret of Whale Island in 2013, and the newest book, The Thea Sisters and the Secret Treasure Hunt, was published in 2017.