Reddit mentions of A Military History and Atlas of the Napoleonic Wars

My best advice would be to study the campaigns of successful military leaders. You can do no better than this.

I would suggest studying Napoleon first and foremost, then also look at the campaigns of The Duke of Wellington, The Duke of Marlborough, Turenne, Frederick the Great, Eugene of Savoy, Charles XII of Sweden and Maurice de Saxe to name but a few.

I prefer targeted studies to general histories but there are some good ones out there regardless.

The Goodwill has potential, where books are concerned, if you are very lucky that day.

I once paid about three bucks for a copy of A Military History and Atlas of the Napoleonic Wars. My friend who does historical war gaming was very pleased.