Penny Allen and the mystery of the haunted house

It isn't every day that a family inherits a haunted house. But when Philip Allen, with his brother Jimmy and his sisters Marjorie and Penny, went up to Michigan to investigate their legacy, they discovered they had an uninvited guest. It was the Green Lady, whose ghost was said to haunt Uncle John's lodge. How they solved the mystery and made wonderful new friends is an exciting adventure story all girls will love. (From Goodreads)