The Invisible Intruder, Nancy Drew Mystery Stories Series #46

Despite the mysterious warning, the pretty teenage detective and a group of friends start out on a ghost-haunting expedition to investigate five places reputed to be haunted. Danger strikes at once when Nancy tries to overtake the canoe that paddles itself on Lake Sevanee. Thrills and chills mount as the ghost hunters pursue a phantom horse and ghost rider racing across the field that surrounds the Red Barn Guesthouse. During these happenings and other weird events Nancy finds herself pitted against a dangerous adversary, clever enough to operate invisibly.

In a dramatic climax Nancy outwits her enemy in an eerie mansion and traps him in the frantastic room of skulls. This unusually intriguing story will delight all Caroylyn Keene fans. Recommended for ages 8 to 12.