You need to check out "Napoleon's Pyramids" by William Dietrich. It starts in France moves to Napoleons invasion of Egypt, the Battle of the Nile and moves to the invasion of the Holy Lands. Lots of battles on land and sea + mystic mystries. The next book the "Rosetta Key" continues with the French attempt to conquer the Holy Lands. This has two good sieges that give a nice feel for the conflict in the time period. Both give lots of ideas for campaigns in this era.