"While backpacking in the desert, thirteen-year-old Mark falls into a tube of blue light and is transported into a more primitive world, where he must use his knowledge and skills to survive."@en . "Downloadable audio books"@en . "While backpacking in the desert, thirteen-year-old Mark falls into a tube of blue light and is transported into a more primitive world, where he must use his knowledge and skills to survive." . . . "Science fiction"@en . . . . . . . . . . . . . . . . "Audiobooks"@en . "The Transall saga"@en . "The Transall saga" . "Fiction"@en . . "Fiction" . . . . . . . "Children's audiobooks"@en . . . . . "Juvenile works"@en . "Juvenile works" . . . . "Downloadable audio books." . . "1900 - 1999" . . . . "Downloadable audiobooks." . .