Lottery by Patricia Wood

Perry L. Crandall knows what it's like to be an outsider. With an IQ of 76, he's an easy mark. Before his grandmother died, she armed Perry well with what he'd need to know: the importance of words and writing things down, and how to play the lottery. Most importantly, she taught him whom to trust - a crucial lesson for Perry when he wins the multimillion-dollar jackpot. As his family descends, moving in on his fortune, his fate and his few true friends, he has a lesson for them: never ever underestimate Perry L. Crandall.

The Society of Others by William Nicholson

An alienated young man can see no meaning in life. He doesn't even see the point of getting out of bed in the morning. To escape from his family he decides to set off on a hitchhiking adventure around Europe, and is picked up by a friendly lorry driver with an unusual interest in philosophy.