The Alfena UFO Incident (1990) remains one of Portugal's most intriguing unexplained events, captivating both the public and researchers alike. This book explores the mystery surrounding strange sightings of unidentified flying objects in the Alfena region, an area shaped by distinctive geography and atmospheric conditions that may have influenced the phenomena.

It details eyewitness testimonies, physical evidence, and official investigations, examining possible explanations from scientific, military, and extraterrestrial perspectives. The story also delves into the cultural and societal impact of the incident, as well as its connections to similar global cases.

Throughout, the book highlights the ongoing questions, declassified documents, and the role of secrecy surrounding UFOs. Whether you're a believer, skeptic, or curious observer, this book sheds light on the complexities of one of Portugal's most enduring mysteries, prompting readers to reconsider what they truly know about the skies above.