When sixteen-year-old Addison Hart wins a puzzle competition, her prize is an all-expenses-paid trip to the historic Swarthaak Lodge in Namibia's Kalahari Desert. But a chilling line of fine print - Solve the mystery, or join the vanished - hints that this is no ordinary getaway.
As a storm traps the guests and strange messages begin appearing, Addison must use every puzzle-solving instinct she has to untangle a fifty-year-old disappearance, a stolen formula, and the forgotten knowledge of the San people.
Some secrets have thorns.
