Three Little Ghosts — Janet McNulty

In this fourth book in the Mellow Summers Series Mel finds herself on a new mystery with the ghosts of three little girls. While at the library investigating a ghost story for Tiny, a woman is murdered. As the investigation intensifies, Mel discovers that the victim was not so innocent after all. Embarking on one twist after another, Mel tries to find the murderer and help the three girls cross over.