Instruct: Classify a review into positive or negative sentiment.
Query: good premise, disappointing writing

This book has what could have been an interesting story line. A female Pinkerton detective in England caught in a masquerade as the estranged wife of a (predictably) handsome, dashing duke. What will happen? Why/how did the duke's brother and heir to the title and estate die? Who has been trying to kill Yancey, the Pinkerton detective? And what happened to the duke's actual wife? I wish the author had invested the effort to make the characters and the writing fit the time period. I know it is a paperback romance, but I wish the writing was just better in general. It was okay, and if enough time goes by I may remember only the premise and want to reread it, but it won't be on the strength of the writing. So disappointing, because I love a good historical romance and this was almost, but not quite, one of them.