Papa's Suns by Kevin McNamee is the only book I've seen that will help kids deal with a family member having a stroke.
The book tells of a kid whose grandfather, who he calls Papa, draws pictures for him and shows him how to draw. The two of them have a close relationship, but when Papa has a stroke he can't talk anymore.
But he's still able to draw a sun for Jacob, and does so.
This charming book, with illustrations by Samantha Bell, will be a wonderful discussion starter for children who know someone who has a stroke. And it would be a great addition to the children's books in hospital waiting rooms and doctor's offices.