The Truth That Leads to Eternal Life (Definitely the greatest impact as it resulted in 30 stolen years of life)
Trout Fishing in America - Richard Brautigan (not really about Trout Fishing)
In honor of 9/11, my favs in its aftermath:
Lies, and the Lying Liars Who Tell Them - Al Franken
Against All Enemies - Richard Clarke
Imperial Hubris - Michael Shoyer