This Rick Riordan novel isn't about Percy Jackson or Greek mythology - surprising, right? And it's also a pretty hefty book, with a 514-page long hardcover version - shocking!
It's very good, though; it's all about Carter and Sadie, two first-person narrators and young teenaged siblings whose parents were excellent magicians who followed the Egyptian mythological traditions. And yes, Egyptian mythology and deities are involved - fun!
Everything takes place in the same world as the Percy Jackson series (you can tell by the passing references to the Greek gods), but in different locations. For example, a big chunk of the action takes place in New York City, but in Brooklyn rather than Manhattan, since Manhattan's under the control (or is it jurisdiction? I'm not sure) of gods other than the Egyptian ones. And if that wasn't a reference to Mount Olympus over the Empire State Building, I'm a lemur.
Oh, and I'm thinking that that world is in grave peril a lot of the time. Seriously, it's endangered by Hellenic pandemonium one week, and by Egyptian chaos the next - should I expect some Norse trouble in the near future? (I'd read that.)
In any case, I'll keep an eye out for the next installment of The Kane Chronicles.