The Legend of Paul McGurney (McGurney Chronicles)

When Todd, Zak, Jordan, and Andrea agreed to spend the summer in their grandmother's remote cabin in the Colorado mountains, they thought their biggest concern was death by boredom. Without video games, cell phone reception, or Internet connection, the summer was supposed to be filled with leisurely naps by mountain streams and mundane hikes through wilderness trails. After stumbling upon a decrepit house on a forgotten hill, the children come face to face with Paul McGurney, a mysterious man with seemingly no past, who offers them a chance of a lifetime: a portal through time to bear witness to the life of the most famous man in history. But with this exclusive glimpse comes a hefty price, as an evil is unleashed that wants nothing more than to seek and destroy the children before they can fully experience what Paul McGurney is showing them.