One way to find books in our Library is to simply browse the shelves. Look for the following Dewey Decimal Numbers:
973.7 - General number
973.7092 - Biographies
973.73 - Military operations - including specific battles
973.7359 - Chattanooga Campaign, 1863
973.75 - Naval history
973.77 - Prisoners of war; medical and social services
973.78 - Personal narratives
Don't forget to check the Reference Section as well
Mountains Touched with Fire by 
This Terrible Sound by 
The Shipwreck of Their Hopes by A more efficient way to search is to use the library online catalog. You can search by author, title or KEYWORD
Battle and Leaders of the Civil War by 
The Civil War by