I have never read a book that is told from the point of view of a mentally disable person and I think that this book is a good introduction to the idea: Girls Like Us by Gail Giles about Quincy and Biddy who are both graduates of their high school’s special ed program.
They couldn’t be more different: suspicious Quincy faces the world with her fists up, while gentle Biddy is frightened to step outside her front door. When they’re thrown together as roommates in their first “real world” apartment, it initially seems to be an uneasy fit. But as Biddy’s past resurfaces and Quincy faces a harrowing experience that no one should have to go through alone, the two of them realize that they might have more in common than they thought — and more important, that they might be able to help each other move forward.
A moving and thoughtful book. The perspectives of Quincy and Biddy bring to light the prejudices that exist towards those that are different and the dangers that come with being vulnerable. Just a warning – there are some intense and mature situations in this novel.