Hallows Haven by Melissa Brodsky

Captain of the cheerleading team, 16 year old Gwen Valiente has it all--the best of friends, a loving home, and a bright future. Little does she know that the people she loves the most have been keeping secrets--life-altering secrets.

When strange things start to happen to Gwen, she is thrust into a magickal new realm called Hallows Haven. Leaving the ordinary behind, she discovers that she can do things beyond her wildest dreams. As Hallows Haven begins to feel more like home, Gwen wonders how she ever felt satisfied with everyday life in Michigan.

Too late, Gwen realizes that even in this realm full of light and magick, danger lurks. Someone close to her is not what he seems and someone will do anything to draw her out of Hallows Haven and into the darkness. Even worse, some of that darkness may already exist within her, threatening her chance to make Hallows Haven her permanent home.
Have Gwen's loved ones continued to keep dangerous secrets? Can Gwen resist the call of darkness?