Book excerpt: Sharks are perhaps the most feared and misunderstood creatures on earth. They have inhabited the planet for 450 million years, and over that time they have evolved into hundreds of highly varied and fascinating species. In this comprehensive and colorful third edition, shark expert Dr. Greg Skomal takes us on a captivating tour of the world of sharks-what they are, how they evolved, and how they thrive in their marine environment. He provides close-up, detailed views of: Shark anatomy and adaptation, Shark conservation, Shark attacks, Over 450 species, And more! The Shark Handbook, 3rd Edition comes alive with vivid, full-color photography from outstanding photographic contributors. Book jacket.