Whispers of Spitfire: Iron Lion

From the back cover:

In the midst of a new ice age, brave shamans hunt gods born of black glass and steel. The blood of these gods is sacred, and the shamans of each tribe are marked with the sacred blood in ways that give them strange, supernatural abilities.

This is the third book in the story of a young shaman who walks between the tribes. What was only meant to be a winter spent in the lands of the Sky Wolf Mother becomes so much more when refugees from the tribe of the Iron Lion arrive seeking help from Vitsena tribe. Secrets of the dead come to life deep within the Iron Mountains, and Sun-Wolf's path will never be the same again.

ISBN# 978-1-716-42061-0