Lion Adventure is a 1967 children's novel by the Canadian-born American author Willard Price featuring his "Adventure" series characters, Hal and Roger Hunt.
It depicts their attempts to capture a lion for a zoo, which is hampered by a dangerous man-eating lion who parallels the well-known Tsavo maneaters.
The hydrogen balloon, the Jules Verne, is named after the author Jules Verne, who wrote the novel Five Weeks in a Balloon, whose plot mirrors the adventures Hal and Roger have in their balloon.
Kirkus Reviews reviewed it negatively, saying, "Gore plus stultifying stereotypes equals jungle rot (and unintentional camp).
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