Time Quest #1: Danger Zone

Twelve-year-old Sean Murphy’s granddad is a retired scientist who has worked on top secret projects for the US government.
But the government doesn’t know about his latest secret project, and Gramps hopes to keep it that way.
After Sean accidentally discovers that the project is a time portal, he and his friend see a golden opportunity to complete a difficult school history assignment by watching events as they actually unfold.
Embarking on the greatest, most dangerous adventure they’ve ever experienced, they manage to uncover a grave injustice that has remained hidden for decades.
But in order to reveal the truth, they must survive long enough to make it back home in one piece...