That is a good book, and there's also Grant and Lee By Major General JC Fuller. Differs from the Smith book as being more of a study of the generalship of the two commanders. Fuller tells us how he started the book convinced that Lee was the greatest general of the civil war, and Jackson was a close second. He ended it believing that Grant was not only the greatest general of the civil war...he was one of the greatest US military leaders of all time.
And don't laugh: "Gone with the Wind." Still the most accurate portrayal of the home front at the time of the Civil War.
There's a novel that was written at the time which bears comparision to GWTW : Miss Ravenel's Conversion from Secession to Loyalty by J W DeForest, a Union veteran. The book deals with a southern belle's conversion, obviously, and the concommitant threeway romance between her and two rival Union officers. DeForest is considered an early "realist" writer, but while a talented writer, his works were not popular with contemporaries. They prefered more sentimental books, and his output was small. Both factors have prevented him from receiving the recognition to which his talent entitles him.