more about this topic i would direct you to not only buy these books but also take a look at richard hostettler's book, the age of reform. but weren't these guys great? one more hand. [applause] [inaudible conversations] >> you're watching book tv on c-span2. 48 hours of nonfiction authors and books every weekend. >> up next, booktv sat down with george washington university professor marcy norton to discuss her book, "sacred gifts, profane pleasures." this is about 20 minutes. >> george washington professor marcy norton, where did snickers bar and mara broke him from? >> well, we have to go way back in time, tobacco and chocolate are both native to the americas. and were developed by indians. tobaccos in the distant past several thousand years b.c. and a cow which is the raw central ingredient to chocolate, likewise, made about 3000 b.c. and so they were central to native americans and when europeans had no knowledge of that until they arrived starting with columbus in 1492. and went from their. >> how would they use in these ancient cultures? >> so, tobacco was used in a whole multitude of ways