Dinosaurs Before Dark

This enjoyable time-travel fantasy is a successful beginning chapter book. Jack and his younger sister find a tree house filled with books. When he wishes he could really see the Pteranodon pictured in one of them, it appears at the window. The children have been transported back to the Cretaceous period. They begin to explore and are soon threatened by a Tyrannosaurus. The Pteranodon comes to their rescue, and they figure out enough about the magic that carried them back in time to be able to u