Notes

Translated from the Italian

Summary: A prime number is a lonely thing: it can be divided only by itself, or by one; it never truly fits with another. Alice and Mattia are also alone, each haunted by childhood trauma. Alice bears the scars of a terrible skiing accident that nearly killed her, and Mattia lives with a guilty secret that lies at the heart of his disabled twin sister's disappearance. When they meet as teenagers, they each recognize in the other a kindred, damaged spirit. As they grow into adulthood their destinies seem irrevocably intertwined. But when the gifted Mattia wins a mathematics posting that takes him thousands of miles away, it seems that love, or its loss, might just be a game of numbers after all; until a chance sighting by Alice of a woman who could be Mattia's sister forces a lifetime of hidden emotion to the surface