The Chapman kids travel back to 1934 where they meet Gutzon Borglum, sculptor of America's greatest engineering and artistic marvel, Mount Rushmore. When the Time Spies arrive, Borglum's in trouble. His massive sculpture of Jefferson has cracked and a mystery is afoot that threatens to scuttle the entire project. Can the Time Spies find a way to save this American masterpiece?

Read a list of other books in the series.

You can also read a sample chapter online.