Ringan Laine series by Deborah Grabien 
Weaver and the Factory Maid Coming into ownership of a restored eighteenth-century cottage, British folk musician Ringan Laine discovers that the property is haunted and is assisted by long-time girlfriend Penny in researching the identities of his otherworldly tenants.  I liked the premise but it wasn't a prefered read.  I will try another one to see if it improves.