Lamb - Bonnie Nadzam

'She was coming toward him in a crooked purple tube top and baggy shorts and brassy sandals studded with rhinestones. She carried a huge pink patent-leather purse and was possibly the worst thing he'd seen all day.
'Hi.' She had a little gap between her teeth, and her eyes were wide set, and she had one of those noses with perfectly round nostrils. She was a pale little freckled pig with eyelashes. 'I'm supposed to ask you for a cigarette.'
This ugly kid before Lamb was obviously the brunt of a joke. Stupid.
And reckless. Had they any idea who he was? Why he was standing alone in a black suit? What kind of heart, if any, hung inside him? And how was this not a joke on him? He took a pull on his own cigarette and put it out on the bottom of his beautifully polished shoe.'

Tommie is eleven.
Lamb is a middle-aged man.
He is convinced that he can help her avoid a destiny of apathy and emptiness.
He even comes to believe that his devotion is in her best interest.