Song of the Cimarron (Heartsong Presents)

is book #304 of the Heartsong Presents line.
==Book Description==
Cimarron, Texas, is in the grips of a smallpox epidemic that has killed the town's only doctor. Everyone now depends on Katelyn McKnight's untested nursing skills for their survival. — James Conner never before noticed the beautiful young woman from the edge of town, or he would not have pledged himself to another. Working alongside Katelyn is causing him daily heartache.
In their darkest hour, Katelyn, James, and the people of Cimarron desperately need a song of hope. Facing her own losses and the realization that the man she loves is committed to another, can Katelyn find the strength to lead the community through this ordeal?
(Description from paperbackswap.com)