A Little Fate by Nora Roberts

In The Witching Hour (Once Upon A Midnight - 2003), a kingdom is plagued by tragedy until a wizard-god's spell brings forth a courageous and beautiful young woman who must follow her heart in love--and follow her destiny in battle.

On a remote island cursed with eternal winter, a young queen heals a wounded soldier--and warms her heart with the joys of true love in Winter Rose (Once Upon A Rose - 2001).

In A World Apart (Once Upon A Kiss - 2002), a ravishing medieval Demon Slayer arrives in 20th-century New York to brave a strange new world--and a man who is her destiny.
 
- Goodreads Summary