I am looking for a series of books I read when I was in Middle School around the 1990’s, probably published before then. It was about a group of ghosts, at least four or five, who went around investigating things that happened, including why people died, mysteries involved around the living, and at least one where a ghost who had moved on to the next realm was affecting the current ghostly realm out of vengeance. Would love to find the books again, but I do not remember the names of any of the books as I have read hundreds of books since then. They were just some random finds one day when I got bored and was sent to the library to find a book at the middle school in North Carolina.
Lost Classics of Teen Lit: Name That Book! 