Dr. Greg Skomal, biologist and head of the Massachusetts Shark Research Program, is investigating a controversial possibility: Might Cape Cod's waters serve as a breeding ground for the great white shark, the largest and most feared predatory fish on Earth?

Sy Montgomery and Keith Ellenbogen report on this thrilling turning point in marine research and travel to Guadeloupe, Mexico, to get up close and personal with the sharks. This daring expedition into the realm of great whites shows readers that in order to save the planet and its creatures, we must embrace our humanity and face our greatest fears.