Her work in pre-scientific fossil discoveries and traditional interpretations of paleontological remains has opened up a new field within the emerging discipline of geomythology and classical folklore.

In American Journal of Archaeology, Deborah Ruscillo, Washington University in St. Louis, writes that this multidisciplinary book is written so that a layperson not well-versed in the topics it delves into may understand it.

[12] Mayor's third book gathers Native American accounts of discoveries of dinosaur and other fossils and oral traditions about their meaning, from pre-Columbian times to the present.

Much of the focus of the book is in challenging the idea put forth by paleontologist George Gaylord Simpson that precolonial indigenous peoples of the Americas did not take notice of the many fossils found on the continent.

According to Bryce Christianson, for the American Library Association, Mayor "illuminates the surprisingly relevant views of early peoples confronting evidence of prehistoric life" in a "pioneering work [that] replaces cultural estrangement with belated understanding.

"[13] Norman MacLeod (Natural History Museum, London), writes in Paleontologia Electronica that he was “disappointed” in the book, although Mayor "has done a great service to Native Americans by collecting together many of their legends, including many that had previously been unrecorded.

"[14] In his review for Geological Magazine, Paul D. Taylor (Natural History Museum, London) writes that the book will appeal to palaeontologists, anthropologists, and folklorists,” as well as geologists.

It also includes information on the linguistic origins of the word “Amazon" and details how nomadic horsewomen-archers of the steppes influenced ideas of warrior women.

Jasmin W. Cyril wrote in Kadin/Woman 2000 that “any reader or researcher will be well rewarded through a perusal of this monograph and will find immeasurable advantage in the notes and bibliography.”[20] In the American Journal of Philology, classicist Alison Keith criticized Mayor's tendency to make unsubstantiated assertions, treat folklore as fact, and neglect context for some sources; Keith felt that the book was “rich in research but weak in accepted methods of scholarship.”[21] In the New Statesman, classics professor Edith Hall declared the book was more than "an important contribution to ancient history," opening "up new horizons in world storytelling and feminist iconography [with] rigorous scholarship and poetic charm."

Hall argued that by "painstaking research into the literature, folklore and ancient traditions of the myriad peoples between Greece, Russia and China, especially the Kyrgyz, the Azerbaijanis and the Circassians of Caucasia, [Mayor] has broken down the often impenetrable walls dividing western cultural history from its eastern equivalents.

Kirkus Reviews describes the book as “a collection of wondrous tales that present ancient myths as the proto-science fiction stories they are.” [23] Classicist Peter Thonemann calls the book "absorbing" and "accessible and engaging," but feels that the ancient quest for eternal youth should not be included as an example of "artificial life" and wishes for deeper analysis of direct lines from Aristotle to modern AI.