The Invisible Intruder

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The Invisible Intruder
Author Carolyn Keene
Country United States
Language English
Series Nancy Drew Mystery Stories
Genre Juvenile literature
Publisher Grosset & Dunlap
Publication date
Media type Print (Hardback & Paperback)
ISBN 0-448-09546-7
OCLC 39934643
Preceded by The Spider Sapphire Mystery
Followed by The Mysterious Mannequin

The Invisible Intruder is the 46th volume in the Nancy Drew Mystery Stories series. It was first published in 1969 under Carolyn Keene. The actual author was ghostwriter Harriet Stratemeyer Adams.

Plot summary[edit]

Nancy and her friends are invited on a ghost-hunting tour, visiting various locations reputed to be haunted. They gather clues that point to a more mundane explanation.

Helen, Nancy's friend from the earliest books in the series, makes a rare appearance.