"Gibraltar" . . . . . . . . "Adventure fiction"@en . "The boy with one shoe"@en . . . "Juvenile works"@en . . . "Two thirteen-year-old boys who are helping in the fight to free Denmark from Nazi occupation are sent to the Rock of Gibraltar during World War II to try to contact a smuggler to aid their cause."@en . . . "Historical fiction"@en . . "Fiction"@en . . . . "1939 - 1945" . .