I stumbled across a book called The Haunting and its a Harlequin book that sounded really interesting to me. So my question is what romance books are there that are about old houses, hauntings, ghosts, reincarnation, paranormal, or the supernatural? I have never read any Harlequin or books like it and would be interested in reading them if they were about any of these things.

There is a line of Harlequins called Silhouette Nocturne that is paranormal romance. I've read a few, they were OK.

In general, I only read Harlequins when I want a really fast read, for some reason. Or if I have a stack of them I want to post. I find them to be middle of the road in quality ... usually OK, very rarely really good or really poor. There is a formula they are written to, so after you read a bunch you get tired of them for a while because they are all so the same (or, at least, I think so).