A trilogy I liked a lot that is a little different is by Thomasine Rappold called "The Sole Survivor Series." Each book has a heroine with some special gift. For instance, the first book's heroine has the ability to heal, The Lady Who Lived Again. These are all historical romances.
I just downloaded several freebie titles that were parts of trilogies, and remembered this thread. Tealadytoo, did you choose a trilogy? How did it go?