A bestselling international literary sensation about whether a "prime number" can ever truly connect with someone else A prime number can only be divided by itself or by one--it never truly fits with another. Alice and Mattia, both "primes," are misfits who seem destined to be alone. Haunted by childhood tragedies that mark their lives, they cannot reach out to anyone else. When Alice and Mattia meet as teenagers, they recognize in each other a kindred,...