The Rosetta Key — William Dietrich

American adventurer Ethan Gage barely escaped with his life from murderous thieves, survived a nerve-racking sea voyage and the deadly Egyptian sands when attached to Napoleon's army, and solved a five-thousand-year-old riddle with the help of a mysterious medallion.

But that was child's play ...

The year is 1799. As Bonaparte's army descends upon Israel, intent upon conquest, Ethan Gage finds himself embroiled in an ancient mystery in the Holy Land, searching for a legendary Egyptian scroll imbued with awesome powers. The courageous and resourceful Gage must keep the mysterious document from his enemy, Napoleon -- or, failing that, wrest it from him, even if it means pursuing his vengeful adversary back to France. And the wisdom of his great mentor, Benjamin Franklin, will offer Gage no solace should Bonaparte succeed in unlocking the terrible secrets of the Book of Thoth -- for whoever masters its magic will rule the world.