
The Black Circle
by Gordon Korman
The Black Circle is the pulse-pounding fifth installment in the global phenomenon series, The 39 Clues. Following the adventures of orphaned siblings Amy and Dan Cahill, this book takes readers on a high-stakes journey across the globe as they hunt for the source of their family's immense power. Faced with a choice between a million dollars or a clue, Amy and Dan choose the path of discovery, leading them into a world of secret societies, historical mysteries, and dangerous rivals. This book is perfect for children who love fast-paced action and puzzles that challenge their wits.
Ideal for readers interested in history and geography, Gordon Korman delivers a masterclass in suspense. As Amy and Dan delve deeper into the Cahill family's past, they must decide who to trust in a race where everyone—from world leaders to famous magicians—is a potential relative or a deadly enemy. It is a great choice for fans of interactive storytelling and those who enjoy uncovering hidden secrets alongside the protagonists.
Highlights:
- A thrilling global scavenger hunt filled with historical intrigue and real-world locations.
- Strong themes of sibling loyalty and perseverance under extreme pressure.
- Engaging mystery elements that encourage readers to solve puzzles alongside the characters.
- Part of a multi-platform experience that includes trading cards and an online game.

The Black Circle
by Rick Riordan
The Black Circle is the pulse-pounding fifth installment in the global phenomenon The 39 Clues series. In this high-stakes adventure, siblings Amy and Dan Cahill find themselves lured to Russia by a mysterious telegram. As they race against their ruthless relatives to uncover the next clue, they must navigate the secrets of the Romanov royal family and the dark history of the Cold War. This book is perfect for children who love fast-paced action, historical puzzles, and stories where young heroes must outsmart dangerous villains.
Ideal for readers interested in world history and geography, Rick Riordan delivers a masterclass in suspenseful storytelling. As Amy and Dan dig deeper into their family's past, they begin to realize that the source of the Cahill power is more complex than they ever imagined. It is a great choice for fans of scavenger hunts and interactive mysteries who enjoy piecing together clues alongside the characters.
Highlights:
- A thrilling race across Russia filled with historical intrigue and hidden secrets.
- Strong focus on the evolving bond and teamwork between siblings Amy and Dan.
- Engaging blend of real-world history and fictional mystery that keeps readers guessing.
- Part of an interactive multi-media series that encourages deep engagement.

The Emperor's Code
by Gordon Korman
The Emperor's Code is the eighth thrilling installment in the global phenomenon series, The 39 Clues. In this high-stakes adventure, siblings Amy and Dan Cahill find themselves in China, racing against their ruthless relatives to uncover a secret that has been hidden for centuries. As they navigate the crowded streets of Beijing and the majestic Great Wall, they must solve complex puzzles related to the last Emperor of China. This book is perfect for children who love fast-paced action, historical mysteries, and stories about clever kids outsmarting dangerous adults.
Gordon Korman brings his signature humor and tension to this volume, making it an ideal choice for readers interested in world history and geography. The stakes have never been higher as the siblings face internal conflicts and external threats, testing their bond like never before. It is a great choice for fans of scavenger hunts and international intrigue who enjoy series like Percy Jackson or A Series of Unfortunate Events.
Highlights:
- Action-packed race across iconic Chinese landmarks like the Great Wall.
- Intriguing historical puzzles involving the Forbidden City and ancient culture.
- Deepening character development and emotional sibling dynamics.
- Fast-paced plot that keeps even reluctant readers engaged from start to finish.

The Maze of Bones
by Gordon Korman
The Maze of Bones kicks off an adrenaline-fueled global scavenger hunt that is perfect for children who love solving puzzles and uncovering historical secrets. When Amy and Dan Cahill are faced with a life-changing choice following their grandmother's death, they choose to hunt for 39 clues that lead to the source of their family's immense power. This high-stakes adventure takes readers on a whirlwind journey across the globe, blending real history with heart-pounding mystery.
Ideal for readers interested in fast-paced action and complex riddles, this book is a great choice for fans of high-stakes competition. As Amy and Dan travel to distant lands like Australia to uncover what their parents knew, they must face off against dangerous relatives and confront painful memories. It is an engaging read that encourages critical thinking and curiosity about world history, geography, and the bonds of family.
Highlights:
- Interactive mystery elements that keep readers engaged with puzzles and codes.
- Strong sibling dynamic between the studious Amy and the adventurous Dan.
- Educational blend of historical facts and international travel settings.
- Perfect for reluctant readers due to its fast pacing and frequent cliffhangers.

The Viper's Nest
by Gordon Korman
The Viper's Nest is the thrilling seventh installment in the global phenomenon The 39 Clues series. Amy and Dan Cahill find themselves in a race against time and their own treacherous relatives as they hunt for the next clue in South Africa. This high-octane adventure is perfect for children who love fast-paced mysteries, international travel, and solving complex puzzles alongside relatable protagonists. As the stakes get higher, the siblings must confront shocking secrets about their family's past that could change everything they thought they knew. The tension is palpable as they realize that the people they are supposed to trust might be their greatest enemies.
Ideal for readers interested in history, geography, and code-breaking, this book keeps young audiences on the edge of their seats with speedboat chases, narrow escapes, and an ever-thickening plot. It is a great choice for fans of Percy Jackson or The Mysterious Benedict Society who crave a mix of action and intellectual challenge. Gordon Korman delivers a masterclass in suspense that will leave middle-grade readers eager to uncover the next secret in the Cahill legacy. Whether they are decoding hidden messages or outrunning an angry mob, Amy and Dan's journey is a testament to the power of perseverance and wit.
Highlights:
- High-stakes global scavenger hunt across South Africa.
- Deepening mystery surrounding the Cahill family history and the Madrigals.
- Action-packed sequences including speedboat chases and narrow escapes.
- Strong focus on sibling teamwork, resilience, and problem-solving.
- Engaging blend of historical facts and fictional suspense.
