The Blood of the Roman [NOT UPDATED SINCE 2014]
tensmydoctor
Maylin Harper is an unusual camper at Camp Jupiter. More powerful than most, and a veteran of the Titan War, Lynn is highly respected at camp. Most people see her as the senator of Cohort Three, the amazing sword player, bested only by her friend and Praetor, Jason Grace, and known best friend of the other Praetor, Reyna. But that's because they don't know her secret. Unfortunately for Lynn, Octavian discovers her horrible mistake, and threatens to expose her, forcing Lynn to flee camp. Lynn has to find a way to stop the Civil War, and fix her mistake before it's too late.