The Return of Black Douglas by Elaine Coffman

While visiting the Scottish tombs of her forebears, American archeologist Isobella Douglas encounters the ghost of her famous ancestor, Sir James, the Black Douglas. The matchmaking ghost seizes on her romantic fantasies, and before she knows it, Isobella and her twin sister, Elisabeth, a doctor, find themselves whisked to 16th-century Scotland, inappropriately dressed. When the dastardly Macleans capture Elisabeth, Alysandir Mackinnon, entirely fascinated by half-naked, strong-willed Isobella, offers to help her get her sister back.

Scottish dialogue, men in kilts -- need I say more?  Coffman does a remarkable job of painting the background of the Scottish Highlands.  The dialogue is superb and the passionate scenes not overdone, which seems to be the norm lately. This is the story of Isobella and Alysandir.  Elisabeth's story will hopefully be in the next book.  Timetravel has to be written well, or it ruins the whole feel of the book.  Coffman succeeds admirably, and although I really didn't love the character of Alysandir, in time I liked him.  If you're looking for a sweet romance set in a different time, pick up The Return of Black Douglas!