The Door of Three Locks Series (Saga La puerta de los tres cerrojos)

The Door of Three Locks | The Path of the Four Forces |

The Five Eternal Kingdoms | The Seed of a Revolution

A teenager trapped in routine, an ancient key, and a universe where the laws of physics cease to exist: The Door of Three Locks saga blends science and fantasy in an epic adventure that, through impossible enigmas and extraordinary creatures, travels from the origins of quantum theory to the fate of the cosmos. A bestselling series that entertains while revealing the secrets of physics.

Niko, a teenager stuck in a monotonous routine, receives a message that shakes him: “If you want different things to happen, stop always doing the same thing.” When he deviates from his usual route to school, he discovers a mysterious house that transports him into the quantum world—a universe where the laws of classical physics no longer apply. There, he meets Eldwen, a scientific elf, and Quiona, a quantum fairy in training who becomes his guide. Together, they explore fascinating places such as the Relativity Clockmaker’s Workshop and the Quantum Intelligence Center.

But knowledge is not all they encounter: Anred, a hostile elf, unleashes the fearsome Black Specters to prevent Niko from returning to his reality, as his return could break an ancient seal. Through labyrinths of trials and magical cities, Niko discovers that he is the chosen one destined to restore the balance between the classical and quantum universes—and he manages to return home.

The ending opens the door to something even greater: a mysterious professor plans to destroy the quantum world, while at the STARMUS science festival, the Higgs boson itself warns Niko of a cosmic imbalance that threatens to destroy everything. An epic adventure of science, magic, and destiny.

The Path of the Four Forces takes Niko on an even more thrilling journey. After learning that the mythical gateway to the quantum world has disappeared, he must find a new way back. With Quiona’s help, he succeeds, only to face troubling news: Decoherence—the mysterious entity that maintains the balance between the classical and quantum universes—has vanished. Accompanied by Quiona, now a fully fledged quantum fairy, the wise Eldwen, and other allies, Niko embarks on a race against time to save the universe from possible disintegration. His journey leads him to the greatest secret of the cosmos: the four fundamental forces of nature. Each challenge tests not only his intellect, but also his courage and his ability to trust others.

The third installment, The Five Eternal Kingdoms, brings Niko to his most decisive and spectacular adventure. What seemed like a return to normality in the classical world is shattered when he discovers that time on Earth is running backward and that the eternal forces sustaining harmony across all realms are on the verge of collapse. To make matters worse, Quiona is trapped in the Realm of Time and urgently needs his help. Joined by his friends, Niko embarks on a race against time to restore balance to the universe. His journey takes him through wormholes, to unknown dimensions, into pocket universes created by altering universal constants, and challenges laws of physics once thought unbreakable. They must cross the Five Eternal Kingdoms, each governed by its own physical rules, filled with extraordinary creatures and intellectual challenges that test their ingenuity, courage, and the strength of their friendship.

The Seed of a Revolution is an exciting prequel where science and adventure go hand in hand. At the beginning of the 20th century, Ada, a brilliant orphan, lives in an orphanage. Her life changes when she receives a message from her former teacher, Sofía, asking her to find a hidden key in “Herschel’s hidden worlds” and help a scientist understand light. Her search leads her into the infrared spectrum, where she meets Dlanod, a quantum elf who takes her into the quantum world. There, amid impossible landscapes and surprising physical laws, she discovers the secrets of light, atomic structure, and quantum theory. Her mission intertwines with that of a young Max Planck, who is about to formulate a theory that will change the course of science. But Spin-O, determined to erase quantum knowledge from the human world, will test her ingenuity and courage. Ada must confront him to protect science and the future.

RELEVANT INFORMATION: Sonia Fernández-Vidal is a writer and holds a PhD in Physics. She has worked at some of the world’s most prestigious institutions, including CERN, Los Alamos National Laboratory, and ICFO. She is also co-founder of Gauss & Neumann and an elected member of the European Academy of Doctors (RAED). In 2017, Forbes named her one of the 100 most creative people in the world.

Exciting, accessible, and full of surprising twists, The Door of Three Locks saga transforms quantum physics into a captivating adventure that entertains, teaches, and fascinates in equal measure—where curiosity is the key and the universe is the door. With thousands of readers of all ages and translations into multiple languages, it opens the gateway to a universe where science pulses with the same rhythm as adventure.

The saga offers strong audiovisual potential thanks to its blend of adventure, fantasy, and real science within a rich and visually striking universe of kingdoms and creatures. Its narratives allow for adaptations with charismatic characters, clear conflicts, and an increasing sense of epic scale. The fusion of quantum physics and magical elements creates spectacular, original sequences that both entertain and inspire scientific curiosity among young and family audiences.

AUDIOVISUAL POTENTIAL: TV Series, Miniseries, Film, TV Movie

AVAILABLE LANGUAGES: Spanish, Catalan, English, Polish, Romanian, German, Lithuanian, Portuguese, Italian, Greek, Slovenian