The end of summer can be sooo boring, especially for budding archaeologists.Stuck at home just weeks before the new school year and with zero chance of even one last mini vacation, Desmond Elleryby is dying for some excitement. So are his two best friends, siblings Corin and Diego Townsend.They try entertaining themselves by learning to fly some of Desmond's new drones, but nothing compares to their recent escapades in Italy and finding the lost treasure of Julius Caesar.So, when Diego learns that tantalizing artifacts from a homegrown American mystery lie close by in a local museum, the kids are bursting for one final adventure before school. Their task? Examine a group of ancient stones to find clues to the disappearance of an old English colony that vanished five hundred years ago from the North Carolina coast, the famous Lost Colony of Roanoke Island. Legend says one of those disappeared still speaks from beyond the grave in clues she left engraved on those rocks.Unfortunately for the kids, some very bad dudes stumble upon their mission: ruthless criminals who want to steal those same artifacts-and the hidden, powerful truth those relics might conceal.To outwit the enemy for a shot at solving this centuries-old riddle, Corin, Desmond, and Diego band together yet again as the Adventure Guild to ride out on another heart-stopping adventure.USA Today best-selling author Ernest Dempsey again joins up-and-coming writer Chandler Dempsey to expand their rich, vibrant world of ancient mysteries, hidden truths, and three of the youngest, bravest treasure hunters you've ever met: the Adventure Guild.