The University of Georgia Press has recently started a new online collection of history books about Georgia. It was launched as a collaboration with the Digital Library of Georgia, and it covers biographies, letter collections, and seminal works of Georgia history.
The collection currently has 49 titles, and that will expand as more books are digitized and uploaded. You can read from the collection free online, and you can also buy POD copies through the University of Georgia Press.
The UGP also has over 250 original titles available as eBooks, and you can find them through various eBookstores as well as netLibrary, ebrary, and other digital library services.