No girls allowed at the Olympic Games! That's the rule when the Magic Tree House whisks Jack and Annie back to ancient Greece. But when Annie tells jack to go to the games without her, he knows she's up to something. Will Annie find a way to see the games? Or will she get herself—and Jack—into Olympic-size trouble? Find out in Hour of the Olympics.

Grade 1-3-- 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 use it to return home. There is plenty of suspense and magic here, and enough dinosaur information to please science buffs. Characterization is sketchy and older children will find the plot predictable, but readers just past the easy-to-read stage will find it satisfying. It should attract those who devour Ruth Chew's books. --Louise L. Sherman, Anna C. Scott School, Leonia, NJ