«The Call of the Rift: Flight» by Jae Waller

Philip Pullman meets Avatar in a new epic fantasy series. Seventeen-year-old Kateiko doesnt want to be Rin anymore not if it means sacrificing lives to protect the dead. Her only way out is to join another tribe, a one-way trek through the coastal rainforest. Killing a colonial soldier in the woods isn't part of the plan. Neither is spending the winter with Tiernan, an immigrant who keeps a sword with his carpentry tools. His log cabin leaks and his stories about other worlds raise more questions than they answer. Then the air spirit Suriel, long thought dormant, resurrects a war. For Kateiko, protecting other tribes in her confederacy is atonement. For Tiernan, war is a return to the military life he's desperate to forget. Leaving Tiernan means losing the one man Kateiko trusts. Staying with him means abandoning colonists to a death sentence. In a region tainted by prejudice and on the brink of civil war, she has to decide whats worth dying or killing for.