Oh, what a tedious book about messed-up teenagers, mostly. It is chockful 'o teen cliches. It read like a crappy teen movie starring Sara Michelle Geller. Oh, look at that... it is a crappy teen movie (minus the SMG):
La solitudine dei numeri primi

The hook/metaphor is people as prime pairs. The two disturbed teeny-boppers are each like a prime number, isolated. But they're pretty close to each other because they're prime pairs, as close as they can get as prime numbers, separated by only one number. Sigh.

I must cop to a certain shallowness on my part, as well. I think the math reference in the title was part of why I bought it. Dop.