The Dark Window by Rachel Gillig
Starting off with Elspeth Spindle, a resident of Burden, who as a child wandered into the mist that seems to always be around the township. While in the mist Elspeth ended up contracting "the fever". It's said that people who survive the fever end up having a magical ability afterwards. From the beginning of the story Elspeth has what seems like someone/something else in her mind, she can hear a voice. More than her own thought process, but less than another person. The magic caused by the mist is something that is feared by commoners, and is something that is hunted and by the ‘physicians’ locked up and destroyed. As I progressed into the book there is an introduction to two different sources of magic. There is magic that comes from surviving the fever, which is not completely understood. The other sources of noninfected/fever magic is provided by enchanted cards, each card has a different colour, and symbol associated with their ability, and detriment. ...