Soldiers of Ice — David Cook

In defiance of her Harper superiors, Martine of Sembia travels far north to save the endangered gnomes of the snow-bound valley of Samek
 
In a snow-bound valley, beyond the aid of even the Harpers, a lone village sits in the path of the relentless advance of ice and the fleeing gnolls, pushing ever southward. Of all the Harpers, only the headstrong Martine of Sembia refuses to abandon the gnomes of Samek to their fate.
 
Risking her career as a Harper, Martine flies north to the valley of Samek in an effort to guide the gnomes to safety. When her plans go awry, she finds herself guest of the hermit-warrior Vilheim and distrusted by the gnomes she came to help. Torn between her future as a Harper and her sense of good, can Martine prevent a war that threatens to destroy the very villagers she has come to save?
 
Soldiers of Ice is the seventh book in a series of loosely-connected novels about the Harpers.