Do you know of any good books or resources where I can read about Operation Ranch Hand?

I wrote a post about Agent Orange a while back that might lead you to some places: Agent Orange.

One publication from the Office of Air Force History is Operation Ranch Hand: The Air Force and Herbicides in Southeast Asia 1961-1971 by William A. Buckingham, Jr.

This page might also lead you to some good resources.

Hope those help!