The Sinister Signpost [full stream]

The Sinister Signpost sits on the public chart at Bestselling Audiobooks — a full-length stream you can start immediately.

Racing cars!n Mystery!n Adventure!n These elements combine to give Frank and Joe Hardy one of the most dangerous and intriguing cases of their careers.n n It all starts when their father,n Fenton Hardy,n is engaged by an experimental race car and motor designer to investigate a series of mysterious accidents.n Three of the company’s drivers have crashed because the windshields of their cars were suddenly crazed,n thus cutting off forward vision.n n Frank and Joe uncover one slim clue.n Each of the drivers had seen a signpost marked DANGER shortly before the accident.n The young detectives investigate,n only to discover that the signposts have vanished.n What happened to them?n And what sinister purpose did they serve?n n The attempted theft of a secret experimental motor

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