A Twist of Power, Book 3 of the Madeline Journeys
Madeline's home is threatened by a magical assault from the faraway City, intent on destroying the heir to the Summer Lands. There she must go, if she is to finally put the past to rest.
Help is easily offered by newfound friends - Regis, a human mage, and Springheart, an elf wanderer. But who can she really trust in a City where trust is bought and sold, and even her magic begins to fail her?