Great Book to Teach Point of View

I just finished reading The Twyning by Terence Blacker.  I had a hard time putting it down from start to finish!  It's a book written for middle or high school students, but I really enjoyed reading it.

As I was reading, I realized that this would be a great book to discuss character point of view because it switches between the main characters: Dogboy and Efren.

Here is my official review for http://childrenslit.com/

What could further apart than humans and rats? In truth, nothing could be more similar.  The young ratling, Efren, is a loyal subject of his kingdom. He knows he must obey his leaders and above all else, he knows humans are the enemy. The adolescent, Dogboy, assists Dr. Ross-Gibbons as he attempts to annihilate the entire rat race. Dobboy knows he must obey his leaders if he wants food and shelter, even if that means animals will be killed. Efren and Dogboy are kindred spirits, despite the fact that they have been raised to believe they are enemies. They each possess a dogged determination to press on, despite setbacks. They each possess the power to save the other, but they carry on a tradition motivated by ignorance and fear. Both species need to beware savagery, selfishness, and greed. If each can see that the threat of extinction comes more likely from within their own race than from without, they stand a chance of survival. 

Warning: The plot line of this book can sometimes be confusing due to the fact that it quickly and often switches between characters’ points of view. Serious and mature content is woven throughout the story, such as language, vague references of sex and drugs, and animal cruelty. 

Have you read any good books that can also be used for teaching literature concepts lately?  I'd love to hear about them!