Buck and Toni, along with the rest of the Wild World of Buck Bray TV crew, head to Utah's Canyonlands National Park to film an episode about the canyons and rock formations as well as the ancient people who once lived there. When they learn about dinosaur fossils nearby, they decide to include that in their filming. But soon, Buck and Toni find themselves in danger at the Dinosaur Stomping Grounds, as they try to discover who is behind the vandalization and theft of the area's ancient artifacts.
Kirkus Review:, "Buck, 11-year-old star of a series of nature films for television, is back for a second outing, this time in Utah's Canyonlands National Park… [when] they learn of dinosaur tracks and fossils located nearby and add these to their filming plans. Nick, a boy they meet while camping, begins to follow Toni and Buck around, creating friction between the pair. Buck is convinced that Nick is stealing things; Toni is pretty sure that Buck is just jealous. That a trusted adult they've encountered is also involved in the theft of antiquities…comes as a greater surprise, putting intrepid (but impulsive) Buck and Toni in real danger… This is punctuated by some exciting moments, including a suspenseful climactic chase scene. (Mystery 9-12)"