I'm resurrecting this old thread about EC Comics to provide a link to a web page that briefly (but colourfully) covers the EC/Bradbury collaboration and how it came about. A fuller account is to be found in the Weist book referred to above, but this web page is a neat precis:

http://goodcomics.comicbookresources.com/2008/03/13/com...egends-revealed-146/