http://www.amazon.com/X-Men-Vol-1-Marvel-Masterworks/dp/0785136983/ref=sr_1_1?s=books&ie=UTF8&qid=1403542300&sr=1-1&keywords=marvel+masterworks+x-men
Here are some resources:
http://curiata.com/content/2600.php
http://theresapablos.wordpress.com/x-men-as-an-allegory/
http://youtu.be/WsiKcf_SwJU -- lecture from Villanova
http://www.comicbookmovie.com/fansites/MsKyle08/news/?a=38850http://www.politeonsociety.com/2013/02/12/civil-rights-and-the-metaphor-of-x-men/