Janette Oke 
When Hope Springs New (Canadian West Book #4) 

Leaving behind their dear friends in Beaver Creek, Elizabeth and Wynn take over an even more primitive RCMP outpost in the Canadian Northwest. Elizabeth finds herself totally isolated when the local Indian women are afraid to even communicate with her. The Delaney’s thought they had already faced the most crushing disappointment of their lives when they saw little Sammy disappear from view in the arms of his father. Would they be able to survive the challenges ahead? Book 4 of the bestselling Canadian West series.