If you are interested in the NSA domestic surveillance/wiretapping controversy, you won't have any trouble finding something to read about it. But, as with any research, the trick is finding something that has the information you need or want.
Two posts that do a decent job of analyzing the complex legal issues are:
- Cass Sunstein's Presidential Wiretapping: Disaggregating the Issues at the University of Chicago Law School Faculty Blog; and
- Orin Kerr's Legal Analysis of the NSA Domestic Surveillance Program at Volokh Conspiracy.