Lee Gatiss has edited George Whitefield's original 57 published sermons into two large volumes (976 pgs, Crossway). You can get the hardcover set for $40+ from WTS or $33+ from Amazon...OR $9.99 FOR KINDLE! That's a deal! From Crossway...
Gatiss includes careful and extensive footnotes detailing the historical and theological background to Whitefield’s preaching, which puts the man and his messages into context for a new generation of readers. The text has also been updated for the twenty-first century with modern grammar, spelling, and punctuation - revised in a manner that leaves Whitefield’s distinct voice intact and coherent for today’s reader.