A terribly written back-of-book story summary

A young girl.  A land at peace.  An evil villain bent on destroying it.  Life will be lost, circumstances will changes, and love will be stretched to the near breaking point.  How far will Kyenna go to save her world? 

Raised by warrior parents, Kyenna is a girl of determination, compassion and spirit.  Although the land has been peaceful for near a decade, once again evil threatens the prosperity of the entire kingdom.  The savagery doesn't seem to affect her personal environment very much, but when Kyenna's brother is taken by ____ for his twisted experiments, she understands just how personal the destruction is.  Kyenna sets out to recover Kyerin, and possibly save the world in the process.

(I still haven't named my villain.)