Blaze of Silver by K.M. Grant
Blaze of Silver is third in the Granville Trilogy by K.M. Grant.
It has the feel of an epic movie with sweeping views of forest, desert, sea, knights, nuns and horses. It is set during the Crusades, but I can't attest to how well it would stand up to a historical fiction label.
While there are interesting elements, fealty/loyalty, jealousy, unrequited love, relationships across barriers and good character sketches, I don't feel it stands on its own for Thumbs Up.