If Only (Heartsong Presents) (Castles)

is book #200 of the Heartsong Presents line.
==Book Description==
The year is 1349, the place, England. As the bubonic shadow across the land, Mary Beckett finds herself alone and desperate. Her father, a physician who has been accused of consorting with the devil, has been murdered. Even her own interest in medicine has brought cries of witchcraft.
Mary's only hope is to journey north to the home of her godly grandmother, a woman her father once rejected. Doctors and pilgrims will cross her path, and, last but not least, Peter Donne, a knight on a mission from the king. Hundreds will beg her to heal them.
Will Mary Beckett, a lonely pilgrim herself, find a way to help her people and herself? If only she could reach her grandmother's home, if only she could find her own way to God...
(Description from fictiondb.com)