Tree of Smoke

Tree of Smoke is the title of a kick-ass-wonderful new novel by Denis Johnson.  Set in a CIA Psy Ops Group in Vietnam in 1967, it offers this nugget of neurophilosophy:

"Something's warping you," Jimmy told the lieutenant.  "Maybe it's your perception of how the brass will see you-- but they're not seeing you at all right now, so it's a perception of a nonperception, man, which is a perception of nothing, which is nothing, man."