Sissy!: Book One of the Jessica Radford Trilogy

In 1857, Nellie, a slave girl, is rescued by the Underground Railroad. Five years later, Jessica Radford's parents, who had adopted the girl, are brutally murdered by a border ruffian and Nellie is kidnapped. How does Sissy, Nellie's angel, finally bring Jessica peace on the most brutal battlefield of the Civil War-Lawrence, Kansas?