![](/images/cover/.tmb/thumb_0671657976-L_100_200.jpg)
The Four-Headed Dragon is the 69th title of the Hardy Boys series, written by Franklin W. Dixon.
![](/images/cover/.tmb/thumb_044808922X-L_100_200.jpg)
The Flickering Torch Mystery is Volume 22 in the original The Hardy Boys Mystery Stories published by Grosset & Dunlap. This book was written for the Stratemeyer Syndicate by Leslie McFarlane in 1943. Between 1959 and 1973 the first 38 volumes of this series were systematically revised as part of a project …
![](/images/cover/.tmb/thumb_0448089572-L_100_200.jpg)
The Firebird Rocket is Volume 57 in the original The Hardy Boys Mystery Stories published by Grosset & Dunlap. The book was written for the Stratemeyer Syndicate by Vincent Buranelli in 1978.
![](/images/cover/.tmb/thumb_0448189194-L_100_200.jpg)
The Disappearing Floor is Volume 19 in the original The Hardy Boys Mystery Stories published by Grosset & Dunlap. This book was written for the Stratemeyer Syndicate by John Button in 1940. Between 1959 and 1973 the first 38 volumes of this series were systematically revised as part of a project directed by …