I thought this would be a great mystery series. I love mysteries and action. The book has a lot of plot twists like when Sam didn't go with the others to get more clues. It was easy to understand. I could have read it when I was in 5th grade.
Escape from Monticello (Virginia Mysteries)
By Steven K Smith
Letters in a mysterious journal between two sisters describe a lost collection and a missing treasure. As Sam, Derek, and Caitlin realize the letters were from Thomas Jefferson's granddaughters, they set out to do what they do best--solve the mystery! When the journal is stolen, the kids are forced to hunt down clues by following Jefferson's footsteps to The University of Virginia, his mountaintop home of Monticello, and a little-known retreat called Poplar Forest. But this isn't a typical walk through history. Someone from the kids' past is lurking in the shadows, bent on revenge and threatening to take much more than just the treasure.
Escape from Monticello is the eighth book in The Virginia Mysteries series. The story is the perfect complement to social studies units, field trips, and family vacations related to Thomas Jefferson, Monticello, and Jack Jouett.