A Haunted Murder — J.A. Whiting

This is book 1 in the Lin Coffin Mystery series. After the death of her grandfather, Lin Coffin returns to the island of her birth, Nantucket, Massachusetts, to make a new start in life, but things don't begin smoothly. After not seeing one for twenty years, a ghost appears in her back yard and her cousin, Viv, becomes a suspect in a murder. Lin and Viv, with the help of several others, work to solve the crime before the killer strikes again. This story has ghosts and some mild paranormal elements.