* Mystery: The central plot revolves around solving a puzzle and uncovering secrets.
* Historical fiction: Each book features historical settings and characters, often intertwined with the present-day story.
* Fantasy: Some books introduce magical elements and supernatural occurrences.
* Thriller: There's a sense of danger and suspense as the characters race against time and face various challenges.
Overall, the series blends multiple genres to create a compelling and engaging reading experience for young adults.