When the Wolf Breathes — Sadie Conall

It's now the spring of 1805 but before they head west to the Snake River Plain, Madeleine, Ryder and Te'tukhe must ride north to the Mandan, an enemy of the Bannock, to trade for a girl Madeleine knew as a child who was taken slave some five years earlier. But first they must part from their son, who they hope to meet at the Lakota within the month, unaware a ruthless killer is tracking them.