I read a very interesting book about Milton Hershey and his company a year or two ago. (Got it from the public library.) I think it's this one:

http://www.amazon.com/Hershey-Milton-Hersheys-Extraordinary-Utopian/dp/0743264096/ref=si3_rdr_bb_product

Assuming that this is the same book I read, there's a lot of interesting detail about the mass-production of chocolate, the history thereof, Mr Hershey himself (an interesting character featuring more internal contracdictions than most of us), and his company and unique little company town, a near-Utopia that eventually went just a little bit sour.