"Hardy boys (series)" . . "Dixon, Franklin W." . . "Detective and mystery stories." . . . . "Frank and Joe Hardy (fictitious characters) Fiction." . . . "The Hardy brothers solve the mystery of the missing inventor and recover some valuable missing jade." . "The Hardy brothers solve the mystery of the missing inventor and recover some valuable missing jade."@en . "Who is writing threatening notes? How could anyone get into the impenetrable secret room of the old mansion? As Frank and Joe investigate, robbery and mistaken identity complicate matters."@en . . . . . . "Juvenile works" . "Juvenile works"@en . . "While the clock ticks" . . . "Meðan klukkan tifar" . . . . . . . "Hardy boys mystery series, #11." . "While the Clock Ticked" . "While the Clock Ticked"@en . . . . . . . . . . . . . . . . . . . . . "Footprints under the window"@en . "A banker who has been receiving threatening notes enlists the help of the Hardy boys. Before very long, the young sleuths find themselves entangled in the investigation of a notorious band of thieves."@en . . . . . . . "Maraṇayaṭa hanḍana oralōsuva" . . . . . "De klok en de tijdbom" . . . "While the Clock Ticked #11"@en . "Detective and mystery stories" . "Detective and mystery stories"@en . . . . . "The boys get into a mystery of thieves stealing from ships and warehouses." . . . . "While The Clock Ticked / : Hardy Boys Mystery #11" . . "Fiction"@en . "Fiction" . . . . . . "Poka idut chasy" . . . . . . . . "A banker asks the Hardy Boys to solve the mystery of a secret room in an old deserted mansion." . "A banker asks the Hardy Boys to solve the mystery of a secret room in an old deserted mansion."@en . . "Frank og Jói : meðan klukkan tifar : drengjasaga" . . . . "Mystery fiction" . "Mystery fiction"@en . . . . . . . . . . "Electronic books"@en . . . . . "While the clock ticked" . "While the clock ticked"@en . . "Kello tikittää vaaraa"@fi . "Hardy boys Fiction." . . "Mansions Fiction." . . "Robbers and outlaws Fiction." . . "Mystery and detective stories." . . "Hardy Boys (Fictitious characters) Juvenile fiction." . . "Mansions." . . "Hardy Boys - Fictitious Characters." . . "Hardy Boys (Fictitious characters)" . "Mystery & Detective Stories." . . "Children's stories." . . "Stolen Treasure - Fiction." . . "Detective and mystery stories Juvenile fiction." . .