At an elevation of 2,100 feet above sea level in the Peruvian desert, the author, along with a group of other paleontologists discovered fossilised primitive whales, dolphins and seals along with a 10 million year old mako shark.
This book contains several hundred black & white photos of fossil sharks, whales, dolphins and seals exposed in the desert, plus an ID section tracing the evolutionary path of the extinct mako shark as it slowly transforms into our contemporary great white.