Dinosaurs Before Dark - Random House Books for Young Readers

Illus. in black-and-white. "With an entertaining blend of fact, farce, and
fantasy, Osborne tells the story of Jack and his sister, Annie, who take a trip
in a magic tree house and land in a time 65 million years ago. They find
dinosaurs and volcanoes and adventure. Veteran storyteller Osborne builds the
power of reading into the story: it's the books in the tree house that give the
kids the magic to travel and see far, far away."-- "Booklist.
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