Here are some online books at,

The Patriots and Guerillas of East Tennessee and Kentucky
http://www.users.kih.net/~dparker/1kyusa/1kyusapg.htm

Admiral Farragut
http://www.encompass.net/~ctyson/civwar/farmain.htm

(cover of 1961 edition) CHICKAMAUGA and CHATTANOOGA BATTLEFIELDS
www.cr.nps.gov/history/online_books/hh/25/index.htm

A Sketch of the Battle of Franklin, Tenn.;
with Reminiscences of Camp Douglas:
Electronic Edition.
Copley, John M.
http://docsouth.unc.edu/copley/copley.html