Letting Go of Lisa

Nathan Malone has been homeschooled his whole life. He's never spent much time with kids his own age and he's never dated. His mother is now busy with his new twin sisters, so Nathan must enroll at the local high school for his senior year. On the first day, a girl on a motorcycle catches his eye and Nathan is excited to discover the girl is also in his English class.
Not only does Lisa ride a motorcycle to school, but she's a loner who seems to come and go as she pleases. She doesn't care what anybody thinks of her. Nathan is intrigued--he's never met anyone like her or had such strong feelings. When he and Lisa finally start spending time together, he's the happiest he's ever been.
But Lisa has a tragic secret and, when she decides she'll handle it herself, Nathan has to make a choice. Can he ever let go of Lisa?

From the Hardcover edition.