When John Kramar comes across an old, rusty Spirit Flyer bicycle, he finds it is far from ordinary. First, the bike helps him save a neighbor's barn from burning. Then it brings him into conflict with the boys in the Cobra Club. A book for young readers.When John Kramar comes across an old, rusty Spirit Flyer bicycle, he finds it is far from ordinary. First, the bike helps him save a neighbor's barn from burning. Then it brings him into conflict with the boys in the Cobra Club. A book for young readers.