Queen of Ice (Through the Fire Book 2)

Surviving demons was only the beginning.
Ruethwyn and her friends survived Midwinter Night and the attack of demons, but it’s only the start of her journey. If Ruethwyn wishes to restore her body and rescue her beloved from a dragon, there is much she must do beyond finishing her first year at Selwyn’s mage academy. Her path leads to the Frostglades to the north and the temperamental fair folk within, along with the unknown power they possess.
The hopes of many others lay on her shoulders, and Ruethwyn is willing to brave the threat of assassins and the machinations of a dark elf to succeed. Yet even still, she does not know what it is she will find at the Frostglades’ heart, or what it is capable of.