As part of the Dark YA Blogfest, I am recommending all of you run out and get a copy of Stuck in Neutral by Terry Trueman.
Why? Charming main character, check. Terrifying conflict, check.
Shawn McDaniel suffers from a severe form of cerebral palsy. He can't speak or control any of his muscles, but despite that, he has a fully functioning brain and is aware of the world around him. He loves his siblings and parents, even though he can't hug them or let them know he understands them. He suffers from seizures that look terrifyingly painful, but to Shawn are actually kind of like being high. So even though his life is extremely limited, he enjoys it.
But when he's fourteen years old, Shawn begins to suspect that his father is thinking of mercy-killing him.
Go. Read it. You won't regret it..