The Sinister Signpost

The Sinister Signpost

Book - 1968
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In one of the most dangerous and intriguing cases of their careers, Frank and Joe Hardy help their father investigate a series of mysterious car accidents. Each of the drivers had seen a signpost marked DANGER shortly before his accident. The young detectives investigate, only to discover that the signposts have vanished. The attempted theft of a secret experimental motor and the kidnapping of a famous race horse are part of this thrilling case, which proves to be as sinister as the signposts themselves.
Publisher: New York, Grosset & Dunlap [1968].
ISBN: 9780448089157
0448089157
Characteristics: 175 p. illus. 20 cm.

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r
red_hawk_850
Jul 03, 2014

I think this book was amazing! these guys were actually really smart, how could they do that and make the signs make the windshield white, the best part was when the planes windshield got white and they had to figure out how to get down.

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