I highly recommend the book Echopraxia, sci-fi written by a marine biologist which explores voices in heads as reptile programs not unlike shell daemons communi

I highly recommend the book Echopraxia, sci-fi written by a marine biologist which explores voices in heads as reptile programs not unlike shell daemons communicating through audio. http://www.amazon.com/Echopraxia-Peter-Watts/dp/076532802X http://www.amazon.com/Echopraxia-Peter-Watts/dp/076532802X