Blue Flame is about the Catholics and the Cathars, two religious groups who once lived in peace but are soon going to be torn apart by a religious crusade. In the midst of the battle two lifelong friends, Raimon (a Cathar), and Yolanda (a Catholic) are falling in love. Their romance is ill-fated - because they come from two completely different backgrounds, they must return to their separate families and proceed on the path destiny has given them. Their only salvation is the Blue Flame, a mysterious yet divine source of power that only one selected individual can control and harvest. Time is running out though, and if the Blue Flame isn't salvaged soon, then both the Catholics and the Cathars could perish for eternity.
The main problem I had with this novel was the fact that I do not know a thing about France in the thirteenth century, or the Inquisition. Sure, I've studied it briefly in World History class, but not to a great extent. Therefore, for about half of the book I had no idea what was going on until the author decided to explain it in a little more detail.
I also didn't enjoy the third person narrative of the land. It was off-putting and impersonal, thus I wasn't able to make a full connection with any of the characters. That being said, Raimon and Yolanda were both interestingly developed and fleshed out, even if they weren't the most intriguing characters ever. The book had action and some romance in it, so it will cater to a variety of teens. Blue Flame would have gotten four stars if K.M. Grant had only done something more exciting with the plot.
The book certainly wasn't horrible, but there's only a slim chance I'll be reading the next one in the series. Sorry.