Description Ben and April Webster never knew their parents were scientists on a secret mission until they disappeared.
The bond of the diverse friendship is tested against many obstacles as the kids continue.
In this science-fiction, adventure novel, the search continues as the group travels from the Lost world of Atlantis, to outer space, to an IMAX theater in the Smithsonian.
Now what awaits them and their friends is a nemesis so deadly that even Uncle Henry can\'t protect them.
Description Ben and April Webster never knew their parents were scientists on a secret mission until they disappeared