Summer of The Woods by Steven K. Smith

When young brothers Derek and Sam move with their family to Virginia, they have no idea what adventures the summer will bring. As they explore their creaky old house and the deep surrounding woods, they uncover a sixty-year-old mystery of a valuable coin collection stolen from the local museum. Join the boys as they spend their summer running from danger and searching the woods, secret caves, rushing waters, and hidden passageways for treasure and the rare 1877 Indian Head cent coin!