Name the name :: woman buys an ancient sword; hero is cursed to obey whoever controls the sword [s]

[Eve]

Hi there,

I read a book a while ago. It's about a woman who buys an ancient sword. And the hero is cursed to go obey whichever woman controls the sword. I think she is a teacher. He takes her back in time to battles he has fought, etc. Hero falls in love with her and wants to remain with her but she releases him from curse and he disappears. Then she's told that she was sick and the entire thing was a figment of her imagination while she was sick. At the end of the book, she meets her new neighbor who looks exactly like the hero and he wrote a book similar to what she dreamt. He is the hero, sent to her time to be with her. I think he's name is Thorn and he was Thor's brother, maybe? Does anyone know this book's title?

[Kagama-the Literaturevixen]

Until Forever