Great fiction has been written out of the very darkest circumstances of our narco violence, and nothing written in either fiction or nonfiction has penetrated that darkness so memorably - you can even say beautifully, a relentless riveting forensic dark beauty that some readers in fact find themselves unable to endure - as Roberto Bolaño's 2666. Especially in "The Part about the Crimes." But here's the thing: nobody would call 2666 a "narco novel."