There are 3 books in the Civil War Trilogy series. The newest book is The Last Full Measure which came out in 1998.

“My favorite historical novel . . . a superb re-creation of the Battle of Gettysburg, but its real importance is its insight into what the war was about, and what it meant.”—James M. McPherson
 
In the four most bloody and courageous days of our nation’s history, two armies fought for…
In the Pulitzer prize–winning classic The Killer Angels, Michael Shaara created the finest Civil War novel of our time. In the bestselling Gods and Generals, Shaara’s son, Jeff, brilliantly sustained his father’s vision, telling the epic story of the events culminating in the Battle of Gettysburg. Now, Jeff Shaara brings…