Eight-year-old Jack and his little sister, Annie, are playing in the woods when they find a mysterious tree house full of books. But these are no ordinary books . . . And this is no ordinary tree house . . . Jack and Annie travel back in time, wearing only their swimsuits! When the tree house lands in the freezing Ice Age, they have to hide from hunters and escape from a great cave bear. But when Jack and Annie are chased by a fierce sabretooth tiger and fall into a hunting trap, they're really stuck. Will anybody come to their rescue?

 

This book is part of a book series called Magic Tree House .

This book has been graded for interest at 5-7 years.

There are 80 pages in this book. This book was published 2011 by Cornerstone .

Mary Pope Osborne is the author of over forty books for young people. She was the president of the Author's Guild, the leading organization for professional writers in the US, for two years and has won many awards for her books. She lives in New York with her husband, Will, and their dog, Bailey, who sleeps on top of Mary's desk every day while she writes.