Check your coverage here:
http://client0.cellmaps.com/viewer.html?cov=1the map looks like they use AT&Ts 3G towers. if so, I note that florence is not currently on the map but should be as AT&T just activated a tower that covers most of florence.
i imagine the thing will use the edge network, too. much slower than 3g but that really isn't a factor for downloading book text. worst case is you have to rely on wireless hotspots (or the wireless in your home if you have it) for downloading.
so id go for it