Throughout the Dinosaur Age, enormous reptiles called ichthyosaurs, plesiosaurs, and mosasaurs swam the seas. Some of these massive creatures weighed more than 20 tons. Others had snake-like necks as long as 23 feet. From Kansas and Canada to Antarctica and New Zealand, fossil bones of these real-life sea monsters have been found.

Acclaimed science author Caroline Arnold and noted natural-history artist Laurie Caple pair up once again to show how fossil evidence worldwide is helping us learn about these amazing reptiles. Featuring eerily beautiful illustrations that bring "fossil creatures" to life, this thoroughly researched book gives insight into what Earth was like when prehistoric predators roamed the seas. Author's note, index.