This work investigates the biological viability and historical struggle for survival of the Key deer, a unique subspecies of the whitetail deer found in the Florida Keys. Julian May, an author known for her meticulous research into natural history and environmental science, examines the specific ecological pressures that pushed this population to the brink of extinction. The text synthesizes historical data with biological observation to explain how geographic isolation and human encroachment shaped the deer's current status.

Experts and naturalists frequently cite this work as a foundational text for understanding the specific ecological challenges faced by island-dwelling subspecies. Readers note the clarity of the prose, which balances technical biological detail with accessible historical context for a general audience.