Here are links to the books Dane references in his sermon:
http://www.amazon.com/Harvest-Empire.../dp/0143119281
http://www.amazon.com/Half.../dp/046500296X/ref=sr_1_1...
http://www.amazon.com/Slavery.../dp/0385722702/ref=sr_1_1...
http://www.amazon.com/Between-World-Me-Ta.../dp/B00SEFAIRI
http://www.yesmagazine.org/