A Perilous Power — E. Rose Sabin

Trevor Blake has always known he possessed magical gifts. But in the small farming town where Trevor lives with his family, the practice of magic is forbidden--and those who reveal their gifts are persecuted. So when his uncle tells him about the underground gifted Community in the city of Port-Of-Lords, Trevor and his best friend, Les Simonton, set off to find it. There, they hope to receive training in the use of their powers.

As soon as Trevor and Les arrive in Port-of-Lords, the trouble begins. Unwittingly, the boys become embroiled in a power struggle among the Community's members. Not sure of whom to trust or where to turn, Trevor and Les may be forced to call upon the most perilous power of all....