I am looking for a scifi/fantasy book that I read 3 or 4 years ago. I cant remember all the details but it involves some war against beings of destruction or chaos where children rally up in one last battle where they win by a trick. I think these children had special abilities that gave them the upper hand. There was also something about a village and an inescapable forest.
I am pretty sure there are at least five books and that this is a series. This story also has something about a old powerplant stations. (I think)