A prime number can only be divided by itself or by one--it never truly fits with another. Alice and Mattia, both primes, recognize in each other a kindred spirit. When a chance occurrence reunites them after years apart, a lifetime of concealed emotions is forced to the surface.

Paolo Giordano is also the author of the critically acclaimed Like Family and The Human Body, and the international bestseller The Solitude of Prime Numbers, which has been translated into more than forty languages, as well as How Contagion Works, about the COVID-19 pandemic. Heaven and Earth is his latest novel. Giordano has a PhD in particle physics and is now a full-time writer. He lives in Italy.