ANTIETAM, by best-selling author James Reasoner, is the third of eight installments in the historical tale of the fictional Brannon family. As Union and Confederate soldiers wage battle on Virgina, it appears that Richmond is doomed. In ANTIETAM, Mac and Will Brannon are united on the front and they experience the change of fortune for the South: General Lee takes over the Confederate cause and later leads his troops to battle against McClellan near the town of Sharpsburg.