Calculus

http://www.mhhe.com/math/calc/smithminton/index.mhtml --timeline history of calculus here

http://www.mhhe.com/math/finmath/hoffmann/ -- click on "Online Learning Center" to access the full text and exercises

http://glencoe.mcgraw-hill.com/sites/0073451342/

http://glencoe.mcgraw-hill.com/sites/0219532320/