Too Smart Jones and the Spooky Mansion by Gilbert Morris

Too Smart Jones and her friends discover a mysterious house outside of town. When she and her brother decide to look around inside the house they hear a strange sound and as they leave. Too Smart also sees a light from inside the house. To add to the mystery, there has been a black limousine seen in town, and nobody knows the owners. Not wanting to get caught doing something wrong, Too Smart doesn't tell her parents that she has been visiting the old house trying to figure out what is happening and learns a lesson in honesty.