Budd Hopkins’ 1987 work, "Intruders: The Incredible Visitations at Copley Woods," is a foundational text in UFO literature that shifted the focus of ufology toward traumatic, multigenerational human-alien interaction narratives. The book, which details the case of Kathie Davis, introduces controversial theories regarding alien hybrid breeding programs and physical evidence of abductions. For a detailed review, visit Moria Reviews . Intruders: The Incredible Visitations at Copley Woods

The widespread availability of has had a profound impact on the study of anomalous phenomena. For decades, the hardcover and paperback editions were treasured but relatively niche. The digital PDF, however, democratized access to Hopkins’ rigorous methodology.

The book chronicles the life of Cathy, a respectable Indiana housewife and nurse who began experiencing classic "haunting" phenomena: missing time, odd scars, nosebleeds, and a persistent phobia of certain times of night. Hopkins uses hypnotic regression (a controversial method even then) to peel back the layers of her memory.

, is a foundational text in ufology that popularised the concept of a systematic, cross-generational alien abduction program driven by a genetic agenda. Centered on the case of Kathie Davis, the work utilizes hypnotic regression to explore themes of hybrid creation and physical evidence, including implants, while significantly influencing public perception through both its claims and subsequent media adaptations. A digital copy of the work is available through Internet Archive Internet Archive

Budd Hopkins' work, particularly "Intruders," has had a lasting impact on the field of UFOlogy. His meticulous research and documentation have influenced many subsequent researchers and authors. While some have criticized his methods and conclusions, Hopkins' work remains a foundational text in the study of UFO abductions.