★Mystery, adventure, coming-of-age novel: in Tommaso Castellani 's trilogy, mathematics merges seamlessly with literature.
★Turn infinity paradoxes into kidnapping mysteries, decode growing pains through triangular ciphers, and map teenage confusion onto four-dimensional space—with Professor Z, every formula becomes a key to the truth.
★On the surface, it's a campus whodunit; at its core, it's mathematical mind-training. While chasing clues, readers effortlessly grasp the essentials of set theory, non-Euclidean geometry, and multidimensional space.
★Teens dive into thrilling adventures and discover the charm of mathematics, while adults reflect on their own journeys through the folds of time. As the protagonist solves cases in a mathematical universe, we all untangle the unproven theorems of our own lives.

This series includes 3 titles:
Professor Z and Infinity
The Mysteries of the Hypercube
Professor Z and the Secret of the Triangle

A Multidimensional Mathematical Adventure
Another intelligent, witty, and captivating mathematical novel—for teenagers and beyond, for those who hate mathematics and those who already love it.

The 1980s. At the end of middle school, Giulio and Ivano spend a vacation together at a campsite. United by their passion for mathematics, the two boys set out to explore the world around them—both the physical world: a beach between two rivers, a pine forest, a mysterious Dark Zone; and the world of geometry: a line, a plane, a three-dimensional space, and even beyond, navigating four-dimensional hypercubes and fractal objects.

But for Giulio, on the threshold of turning thirteen, the most challenging exploration is that of his own growth—through the not-always-easy coexistence with his peers and the discovery and acceptance of his own emotions.

And the secrets of the campsite will lead him to confront the most daunting of them all: Fear.

Blending mystery and adventure, with a mysterious "Avenger" whose identity the protagonists seek to uncover, the narrative fluidly shifts between storytelling and explanations of mathematical concepts, guiding readers on a journey through multidimensional geometry.

Tommaso Castellani
After earning a PhD in theoretical physics, Tommaso Castellani dedicated himself to science education and communication. Today, he teaches mathematics at a middle school in Rome and serves as an editor for the magazine Sapere.