Mysteries of the Ancient Mounds is the first of a trilogy for middle readers that explores connections between the Hopewell Mound Builders, Mayan, and ancient Pueblo cultures. Two best friends, about to be separated by one's move to Arizona are treated to a farewell camping trip in southern Ohio. They visit what remains of a vast network of mounds and meet a Shawnee elder who shares indigenous lore about the ancients. By week's end, the children find a lost Hopewell treasure and help prevent an environmental risk to the Great Serpent Mound.