You're crouched in the African brush, camera at the ready. You're waiting on one of nature's loners. It's dark. It's scary. Then silently, he appears; the ever-elusive leopard. You have seconds to capture on film this wonder of the wild, with its exotic spotted fur, so prized by hunters. National Geographic Explorers-in-Residence Dereck and Beverly Joubert take you closer to the mystery of the magnificent leopard and make a passionate plea to young readers to help secure a future for these feline treasures.