For many years he wrote a regular column for the Saturday Review magazine, called "Trade Winds".
His books include We Almost Lost Detroit, The Ghost of Flight 401, Incident at Exeter, and The Interrupted Journey.
The Interrupted Journey: Two Lost Hours "Aboard a Flying Saucer" (1966) tells the story of the Barney and Betty Hill abduction.
The Hills were a married couple who claimed to have been abducted in 1961 by the occupants of a UFO in the White Mountains of New Hampshire while returning home from a vacation.
The book was the first to seriously claim that competent, reliable witnesses were being abducted by UFOs for medical and scientific experiments.
Aliens in the Skies (1969) is based on transcripts from the July 29, 1968, Congressional Hearing Before the House Committee on Science and Astronautics where experts such as Carl Sagan and J. Allen Hynek testified on the possibility of UFOs.