★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

The third volume of the successful trilogy starring Giulio and his Professor Z, where adolescent problems and doubts clash and intertwine with the grand themes of mathematics—a beautiful story that blends mystery and coming-of-age narrative.

On the threshold of adolescence, the cornerstones of Giulio’s life are no longer as solid as he believed. His body is changing, his desires evolving. How to face such a great transformation? In his world made of school, soccer matches, and long bus rides across Rome, Giulio ventures in search of new experiences, between enthusiasm and fear, great triumphs and bitter disappointments.
And thanks to Professor Z, he discovers that even in mathematics, first principles can change, and incredible new geometric worlds can unfold before our eyes. Set against the backdrop of the late 1980s, this coming-of-age novel weaves a mystery plot with some of the most fascinating aspects of mathematics and logic.

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.