Thomas Kidd published a biography of George Whitefield last year. Albert Mohler recently had a good interview with Kidd . I recommend listen...

By the late great evangelist: http://www.ccel.org/ccel/whitefield/sermons.xxviii.html

Not only was Whitefield a peerless evangelist, he was a saintly Christian: http://www.sbts.edu/resources/category/journal-of-theology/sbjt...

From Arnold Dallimore: [W]hile [George] Whitefield was at Charleston, Commissary Garden confronted him with a copy of Wesley's sermon ...