The Stratagemata of Frontinus by Frontinus
http://www.amazon.com/dp/B019154VUO/
http://www.amazon.co.uk/dp/B019154VUO/
http://www.amazon.ca/dp/B019154VUO/
Frontinus, (40 - 103 A.D.) was a Roman aristocrat and author. His most famous works were on aqueducts (De Aquaeductu), and a military treatise (Stratagemata). Stratagemata discusses military tactics, using examples of Greek and Roman generals. The book was intended to be used by Roman generals, and draws upon Frontinus' experience as a general in Germany under Emperor Domitian.
This is from Palatine Press a 'weird name' publisher. The unusual feature is that this text doesn't seem to be from Gutenberg (There is a scan/ uncorrected OCR on archive.com)
Of course if you would like his other work on the aqueducts of Rome, the original Latin of both and a biography then pay up for the Not Free Delphi edition Complete Works of Frontinus (Delphi Classics) (Delphi Ancient Classics Book 57)
http://www.amazon.com/dp/B019EQUUUA/
http://www.amazon.co.uk/dp/B019EQUUUA/
http://www.amazon.ca/dp/B019EQUUUA/