What is science fiction without aliens? Usually these poor abused creatures get to be the bad guys, but some authors delight (and delight us) in making them the central figures of the work. One of the most delicious and attractive things about SF&F is the ability to look at ourselves from the outside in this manner. Sometimes it's not a pretty picture. It is almost always enlightening.

• Who Goes There? by John W. Campbell
• The Pride of Chanur, Chanur's Venture, The Kif Strike Back and Chanur's Homecoming by C. J. Cherryh
• Cuckoo's Egg by C. J. Cherryh
• The Faded Sun trilogy by C. J. Cherryh: Kesrith, Shon'Jir, and Kutath
• The Foreigner series by C . J. Cherryh 

Foreigner
Invader
Inheritor
Precursor
Defender
Explorer
Destroyer
Pretender
Deliverer
Conspirator

• Stranger in a Strange Land by Robert A. Heinlein
• Moon of Three Rings and Flight in Yiktor by Andre Norton
• The Borrowers, The Borrowers Afield, The Borrowers Afloat, The Borrowers Aloft, and The Borrowers Avenged by Mary Norton

You can purchase titles with an Alien POV through the Other Worlds Bookstore.