No. 3 was the first thing I thought of but that's probably because our book club recently read The Traveler, by John Twelve Hawks. The book deals with living off the grid, but if you look up the author in Wikipedia, his bio (such as it is) is intriguing:
Biography
Both John Twelve Hawks and his American publisher state that he has never met his editor and that he communicates using the Internet and an untraceable satellite phone, usually employing a voice scrambler. No photograph of Twelve Hawks has ever appeared and all biographical information about his background is based on four sources:
* a 2005 article in USA Today
* a 2005 interview by Rob Bedford in SFF World
* a 2006 interview published in Germany in Der Spiegel
* a portion of a 2007 London Telegraph article about popular writers
Twelve Hawks' initial biography on the Random House website was only one line: "John Twelve Hawks lives off the grid." At some point in 2007, that line disappeared and was replaced with "John Twelve Hawks is the author of the New York Times bestseller, The Traveler.
