
Based on your book
by McDougle, Jessica
Nadia Knox is the kind of protagonist who stumbles into greatness rather than asking for it, pulling the reader along on a breathless, high-stakes quest that feels both dangerous and oddly cozy. When she discovers the Eye of Zinnia, her ordinary life is dismantled, replaced by a hidden world where magic is as volatile as it is beautiful. The writing moves with a kinetic energy, prioritizing quick-witted dialogue and sudden, magical shifts that keep you turning pages well past your bedtime. It is a story about finding out that the world is much larger, and far more precarious, than you ever dared to imagine. If you enjoy stories where a sharp-minded girl must navigate a secret society and reconcile her own hidden heritage while the clock is ticking, you will find this impossible to put down.
Since Nadia Knox excels at blending the mundane with the truly bizarre, these picks focus on the specific thrill of finding a secret door in your own backyard. We chose these titles because they capture that same feeling of being an outsider suddenly thrust into a grand, magical destiny. Whether you crave the fast-paced danger of a subterranean war or the whimsical discovery of a hidden society, these stories emphasize the growth of a young hero facing an existential threat. If you enjoyed the journey, these books offer similar portals into unpredictable, expertly crafted realms.
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by Rick Riordan
Much like Nadia Knox, Percy Jackson centers on a young protagonist thrust into a hidden, magical world where they must master their unique abilities. Both books feature fast-paced adventures, high-stakes quests, and a blend of modern life with ancient or mystical elements.
Fans of the sense of wonder and discovery in Nadia Knox will appreciate Lyra Belacqua's journey through parallel worlds and dangerous mysteries. Both narratives feature strong, determined young leads navigating complex, magical landscapes.
This classic shares the themes of interdimensional travel and the importance of courage in the face of overwhelming darkness found in Nadia Knox. It resonates with readers who enjoy stories about young people discovering their own power while facing existential threats.
by B.B. Alston
Amari's discovery of a secret supernatural society mirrors Nadia's journey into the unknown, offering a similar 'fish out of water' experience. Both books excel at building immersive, imaginative worlds that feel both dangerous and inviting.

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This enchanting tale captures the same sense of whimsy and deep-seated magic that defines the Eye of Zinnia's universe. It is perfect for readers who enjoy lyrical storytelling combined with a protagonist who must uncover secrets about their own past.
Like Nadia Knox, this story drops an ordinary child into a subterranean world of conflict and prophecy, forcing them to adapt quickly to survive. The pacing is relentless, and the focus on friendship and loyalty during a crisis will feel very familiar to fans of McDougle's work.
Morrigan Crow's entry into a magical, high-stakes society echoes the excitement of Nadia Knox's adventures. Both books feature vibrant world-building, quirky characters, and a protagonist who finds their place in a world that initially seems to reject them.
by C.S. Lewis
The quintessential portal fantasy, this book shares the core DNA of Nadia Knox: ordinary children entering a magical realm to battle a great evil. It is a foundational text for anyone who loves the 'discovery of a hidden world' trope.
This novel features a young girl discovering her magical heritage in a hidden society, much like the discovery of the Eye of Zinnia. It provides a similar blend of real-world grounding and spectacular fantasy elements.
by Eva Ibbotson
This charming story of a hidden door to a magical island mirrors the sense of secret wonder found in Nadia Knox. It is an excellent choice for readers who enjoy the intersection of the mundane world and a hidden, fantastical reality.

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As an Amazon Associate, we earn from qualifying purchases.
As an Amazon Associate, we earn from qualifying purchases.