There are some 375 recognized species of sharks around the world, with exciting discoveries of new species every year. "Sharks" explores the changing times of these often misunderstood creatures. Popularly described as "killers" and "primitive," recent research reveals that they are rarely dangerous to humans and that they have evolved into sophisticated hunters, with unique adaptations to sustain them as top marine predators. "Sharks" provides the most up-to-date information on the behavior, biology, distribution, reproduction, senses, and habits of sharks. It also calls for swift and far-reaching conservation measures to secure their survival.