Theodore Ayrault Dodge 
Alexander [PDF ebook] 
A History of the Origin and Growth of the Art of War From the Earliest Times to the Battle of Ipsus, B. C. 301, With a Detailed Account of the Campaigns of the Great Macedonian

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. Plutarch (50 to 130 A. D.) is always interesting, and his short life of Alexander is just and helpful. Many stray facts can be gleaned in the other Lives.