Fifteen-year-old Alexander Cold is about to join his fearless grandmother on the trip of a lifetime. An International Geographic expedition is headed to the dangerous, remote wilds of South America, on a mission to document the legendary Yeti of the Amazon known as the Beast.

But there are many secrets hidden in the unexplored wilderness, as Alex and his new friend Nadia soon discover. Drawing on the strength of their spirit guides, both young people are led on a thrilling and unforgettable journey to the ultimate discovery. . . .