John Alva Keel (born Alva John Kiehle) was a Fortean author and professional journalist. Keel wrote professionally from the age of 12, and was best known for his writings on unidentified flying objects, the "Mothman" of West Virginia, and other paranormal subjects. Keel was arguably one of the most widely read and influential ufologists since the early 1970s. Although his own thoughts about UFOs and associated anomalous phenomena gradually evolved since the mid 1960s, Keel remained one of ufology's most original and controversial researchers. It was Keel's second book, UFOs: Operation Trojan Horse (1970), that popularized the idea that many aspects of contemporary UFO reports, including humanoid encounters, often paralleled ancient folklore and religious encounters. Keel coined the term "men in black" to describe the mysterious figures alleged to harass UFO witnesses and he also argued that there is a direct relationship between UFOs and psychic phenomena. He did not call himself a ufologist and preferred the term Fortean, which encompasses a wide range of paranormal subjects.