Bride by Stella Cameron
-Also got this one from a friend. It's set in the time of ladies and castles,and Lady Justine is defying traditions and is planning to write a book,the only problem is,the book's for young brides,and Lady Justine's never been married. So she turns to the help of her brother's friend,and asks him to teach her about love. And turns out,he's a very good teacher...