The Western Way of War : Infantry Battle in Classical Greece​
by Victor Davis Hanson

The Roman Revolution​
by Ronald Syme​

The Face of Battle : Study of Agincourt, Waterloo and the Somme
John Keegan​

Overlord : D-Day and the Battle for Normandy 1944
Max Hastings
​

Arnhem 1944 : The Airborne Battle
Martin Middlebrook

The Complete Works of Tacitus
Cornelius Tacitus

The Jewish War
Josephus

History of the Peninsular War
Charles Oman​

Farewell My Lovely
Raymond Chandler

The Mating Season
P. G. Wodehouse

Winged Victory
Victor Yeates

The Hardest Day : Battle of Britain: 18 August 1940
Dr. Alfred Price

The Far Side of the World
​Patrick O'Brianby Peggy Noonan

Bernard Cornwell
"I also will read each Bernard Cornwell novel as they are released, and am not sure I could single any one out."

Imperial Governor
​George Shipway

Vanity Fair
William Thackery

To Kill a Mockingbird
Harper Lee

Lord of the Rings
J.R.R. Tolkien

SOURCE
https://web.archive.org/web/20130602111200/http://www.blackbirdinc.com/recommendations/64-book-recommendations-from-adrian-goldsworthy.html

Image Source:
Vera de Kok
Adrian Goldsworthy at the presentation of the Dutch translation of "Augustus: from Revolutionary to Emperor"