Preacher's Quest — William W. Johnstone

THEY WERE PILGRIMS IN A PERILOUS LAND
The harsh, unforgiving frontier is no place for innocents. And when an old friend of the Preacher's asks him to guide a gaggle of wide-eyed Easterners through the Rockies, Preacher responds with a polite: "Hell no."

HE WAS THEIR PROTECTOR, THEIR PREACHER...
But the pilgrims are pursued by a gang of outlaws--and then ambushed by angry Indians. With his friend caught up in the melee, Preacher has no choice but to try to rescue him--and anyone else who happens to be within reach.

AND THEIR ONLY HOPE
Suddenly a battle turns into an all-out war as one of the Easterners has an explosive secret that could get them all killed. Add some stone cold cutthroats with a chilling plan, and this man of God will have a devil of a time saving some souls--and sending others to meet their Maker ...