(Paperback)

When Dominique, Eric, Josephine, and Ajay return to the Smithsonian they see that modern animals are extinct and dinosaurs have been brought back to life, so they time travel to the 1876 Philadelphia Exhibition to stop this wicked plot.

(Paperback)

In the third installment of this series, Eric, Dominique, Ajay, and Josephine visit the National Museum of American History and realize that someone is trying to turn America from a democracy into a monarchy.

"Four middle-schoolers visiting the Smithsonian discover that someone is tampering with history. They use their history and science smarts to foil the bad guys trying to rewrite history! With the help of a mysterious museum 'fabrications specialist' named Al, they travel through time to try and restore the Wright Brothers to their well-earned place in history"--Page 4 of cover.