Paolo Giordano - The Solitude of Prime Numbers

Alice looked at the livid little flower that now framed her navel and wondered if Viola would understand that it was for her, for their friendship. She decided she wouldn't show it to her till Monday. She wanted to present it without any scabs, bright against her pale skin. She chided herself for not doing it earlier, so that it would have been ready for tonight. She imagined what it would be like to show it secretly to that boy she'd invited to the party. Two days before, Mattia had appeared in front of her and Viola, with that sunken air of his. Denis and I are coming to the party, he had said. Viola hadn't even had time to come up with an unpleasant remark before he was already at the far end of the hall, his back turned to them and head lowered.

She wasn't sure she wanted to kiss him, but it was all decided now and she would look like an idiot in front of Viola if she backed down.

She measured the precise point where the top of her underpants had to come to be able to see the tattoo but not the scar immediately below it. She slipped on a pair of jeans, a T-shirt, and a sweatshirt big enough to cover the lot-the tattoo, the scar, and the bumps of her hips-and then left the bathroom, to join Soledad in the kitchen and watch her make her special cinnamon dessert.

Denis took deep, long breaths, trying to fill his lungs with the smell of Pietro Balossino's car. A slightly sour smell of sweat, which seemed to emanate not so much from the people as from the fireproof seat covers, and from something damp that had been sitting there too long, perhaps hidden under the mats. Denis felt the mixture wrap around his face like a hot bandage.

He would happily have spent all night in that car, driving around the half-dark streets of the hill, watching the lights of the cars in the opposite lane strike his friend's face and then return it to the shadows, unharmed.

Mattia was sitting in the front, beside his father. To Denis, who had been secretly studying the absence of any expression on both their faces, it seemed that father and son had agreed not to utter a single word during the whole journey, and to ensure that their eyes didn't meet even by accident.

He noticed that they had the same way of holding objects, framing them with their fingers tensed, touching surfaces but not really resting on them, as if they feared deforming whatever they held in their hands. Mr. Balossino seemed to barely touch the steering wheel. Mattia's frightful hands traced the edges of the present that his mother had bought for Viola and which he now held on his knees.

"So you're in the same class as Mattia," Mr. Balossino forced himself to say, though without much conviction.

"Yeah," said Denis, in a shrill voice that seemed to have been trapped for too long in his throat. "We sit next to each other."

Mattia's father nodded seriously and then, his conscience assuaged, he returned to his thoughts. Mattia seemed not even to have noticed that scrap of conversation and didn't take his eyes off the window, through which he was trying to work out whether his perception that the dotted white line in the middle of the road was in fact a continuous line was due merely to his eye's slow response or to some more complicated mechanism.

Pietro Balossino braked a few feet away from the big gate of the Bai family's property and put on the hand brake as they were on a slight incline.

"She's pretty well off, your friend," he observed, leaning forward to see over the top of the gate.

Neither Denis nor Mattia admitted that they barely knew the girl's name.

"So I'll come back for you at midnight, okay?"

"Eleven," Mattia replied quickly. "Let's make it eleven."

"Eleven? But it's already nine o'clock. What are you going to do for only two hours?"

"Eleven," insisted Mattia.

Pietro Balossino shook his head and said okay.

Mattia got out of the car and Denis did likewise, reluctantly. He was worried that Mattia might make new friends at the party, fun, fashionable friends who, in the bat of an eye, would take him away forever. He was worried that he would never get into that car again.

He politely said good-bye to Mattia's father and, to seem like a grown-up, held out his hand. Pietro Balossino performed a clumsy acrobatic maneuver to shake it without unfastening his seat belt.

The boys stood stiffly at the gate and waited for the car to turn around before deciding to ring the bell.

Alice was crouching at one end of the white sofa. A glass of Sprite in her hand, from the corner of her eye she was peeking at Sara Turletti's voluminous thighs, crammed into a pair of dark tights. Squashed onto the sofa they became even bigger, almost twice as broad. Alice thought about the space she occupied compared to her classmate. The idea of being able to become so thin as to be invisible gave her a pleasant pang in the stomach.

When Mattia and Denis came into the room, she suddenly stiffened her back and looked around desperately for Viola. She noticed that Mattia wasn't wearing a bandage anymore and tried to see if he had a scar on his wrist. She instinctively ran her index finger along the trace of her own scar. She knew how to find it even under her clothes; it was like an earthworm lying against her skin.

The boys looked around like hunted prey, but in truth not one of the thirty or so kids scattered around the room paid them the least attention. No one except Alice.

Denis followed Mattia's movements, going where he went and looking where he looked. Mattia walked over to Viola, who was busy telling one of her made-up stories to a group of girls. He didn't even ask himself whether he'd ever seen those girls at school. He stood behind the birthday girl, holding the present stiffly to his chest. Viola turned around when she noticed that her friends had taken their eyes off her irresistible mouth and were looking instead over her shoulder.

"Ah, you're here," she said rudely.

"Here," said Mattia, placing the present in her arms. Then he added a mumbled happy birthday.

He was about to go when Viola shouted in an overexcited voice, "Alice, Alice, come quickly. Your friend's here."

Denis swallowed the lump in his throat. One of Viola's little friends cackled into another girl's ear.

Alice got up from the sofa. In the four paces that separated her from the group she tried to mask her syncopated gait, but she was sure that that was what they were all looking at.

She greeted Denis with a quick smile and then Mattia, bowing her head and saying hi in a faint voice. Mattia said hi back and his eyebrows jerked, making him appear even more spastic in Viola's eyes.

There followed an uncomfortably long silence that only she was able to break.

"I've discovered where my sister keeps the pills," she said, beaming. "Do you want some?"

She aimed her question at Mattia, certain that he wouldn't have the slightest idea what she was talking about. She was right.

"Girls, come with me, let's go get them," she said. "You too, Alice."

She took Alice by an arm and the five girls jostled one another as they disappeared down the hall.

Denis was alone with Mattia again and his heartbeat resumed its regular frequency. They both walked over to the drinks table.

"There's whiskey," Denis observed, slightly shocked. "And vodka too."

Mattia didn't reply. He took a plastic cup from the stack and filled it to the brim with Coca-Cola, trying to get as close as possible to that limit where the surface tension of the liquid prevents it from spilling over. Then he set it down on the table. Denis poured himself some whiskey, looking cautiously around and hoping secretly to impress Mattia, who didn't even notice.

Two rooms away, the girls had sat Alice down on Viola's sister's bed to instruct her about what to do.