Tony Hillerman 
Fly on the Wall [EPUB ebook] 

Ace reporter John Cotton is a fly on the wall — seeing all, hearing all, and keeping out of sight. But the game changes when he finds his best friend’s corpse sprawled on the marble floor of the central rotunda of the U.S. Capitol. Suddenly Cotton knows too much about a scandal centered around a senatorial candidate, a million-dollar scam, and a murder. And he hears the pursuing footsteps of powerful people who have something to hide … and a willingness to kill to keep their secrets hidden.