The second book in Gurney's best-selling series about a "lost island continent where dinosaurs and humans live together in peaceful interdependence." Nearly a painting on every page.

In this classic adventure, explorer Arthur Denison leads an expedition deep into the mysterious caverns beneath the island of Dinotopia. He discovers a fleet of mechanical walking vehicles known as strutters, while above ground his son Will continues his training as a pilot on a giant pterosaur known as a skybax. Winner of the Hugo Award for Best Original Artwork. The Washington Post said "Gurney paints in the grand romantic tradition of N.C. Wyeth." Smithsonian magazine called the book "A ravishing, action-packed adventure."

This came from the library of Burny Mattinson (1935-2023), an animator, director, producer, and story artist for Walt Disney Animation Studios, from 1953 until his death in 2023. Mattinson directed Mickey's Christmas Carol and The Great Mouse Detective. He was named a Disney Legend in 2008 and was the longest serving employee of The Walt Disney Company, with a career that spanned almost 70 years. His extensive library included numerous subjects and especially large collections of books on Disney, animation, and classic comic strips.