Strategy Six Pack 3 presents a classic sextet of tactical texts: Sea Power by Cyprian Bridge. Xerxes by Jacob Abbott. Joan of Arc by Edward Shepherd Creasy. Elements of Military Art and Science by H. W. Halleck. Andrew Jackson by William Garrott Brown. Aircraft and Submarines by Willis J. Abbot. Halleck's Elements of Military Art and Science is a classic manual that is required reading in military schools. There is also Willis J. Abbot's Aircraft and Submarines, the definitive work on early flying machines, an aviation buff's delight. Plus a look at Joan of Arc's defeat of the English at Orleans, a biography of Old Hickory, President Andrew Jackson and an entertaining biography of Xerxes, the infamous Persian potentate who invaded Greece in 480 BC with an army of five million.