Please note, these are both part of series, so if you haven't read the previous books, stop reading! Now you've been warned, so read on at your own risk.
Apophis and his (its?) forces are attacking and destroying Nomes throughout the world in an attempt to also destroy a manuscript written by a long-dead, evil magician, Setne. The Cane's must enlist Setne's help to destroy Apophis, but only if they can trust him.
Their rag-tag team of helpers include Zia, Will, Bast, Khufu and Bes, and as usual a helping hand from the gods, Isis, Horus, Ra and Anubis.
I love these books. They aren't anything difficult to understand, and while they do talk down a bit (the side-bars where the siblings taunt each other are kind of annoying), I still enjoy them so much. I don't know much about Egyptian mythology besides what was taught to me in 5th or 6th grade, so I feel like I'm learning while I'm reading. Of course, Riordan could be making up all this for all I know, but hey, I'll go along with it and assume it's all accurate.
I heard from several people that Insurgent wasn't as good as Divergent. I purposely waited a while before reading Insurgent so that I wouldn't have to wait as long for book 3. Perhaps because of this, I liked it more because I wasn't comparing it to Divergent. I thought it was really good and I thoroughly enjoyed it. My only complaint is that since this picks up right where Divergent left off, I had a hard time remembering all the characters. Also, Roth didn't describe the characters, so I couldn't picture them in my head since they were described in book 1. At the end of 2, she described Will, but it took until the end of the book to find out what he looked like. And Christina? I have no recollection of what she looked like except that she has a different complexion as Tris. So that is my only complaint. Otherwise, it was fast paced and fun. Yes, Tris's and Tobias's trust issues and insecurities were a bit tiresome, but they're teenagers in love. That seemed to be how I remember my relationships at that age. Can't wait for book 3 to come out!