And here we have another of the "let's cram these two things together and see if it makes a book" type books. It's not a bad thing necessarily, but it didn't pull it off quite like "The Professor and the Madman," for instance. You basically get a bit about Champollion and a bit about Bonaparte and since they were both alive in France at at the same time, you just have to accept that that is a strong enough connection.
Not that that's always bad. You get enough about Napoleon to have your interest piqued, and you learn about a guy who nobody could probably name off the top of their heads. Or at least, I know I personally have never been like, "Rosetta Stone? Oh yeah, Champollion." However, don't expect to walk away from this with a real strong grasp on either one.
Personally, this felt like an appetizer type book, and given it's length and language and readability to the uninitiated (raises hand), it's a decent read. I will note, though, that the whole "deciphering of the Rosetta Stone" gets about a page's worth of coverage. I don't know if I like that or not. When you're talking about how one guy mastered a bunch of ancient languages and then pieced together a theory of hieroglyphics, I suppose it is difficult to write it in a way dumb people will understand (raises hand again).
So, really, it was a tough spot and Meyerson did a decent job of putting something together. It's light, pretty much in every top listed in the title and subtitle, but then again, that's to be assumed by a book on these topics that is under 300 pages.