Don Ledger is the author of three books, "Maritime UFO Files" which catalogues some 135 UFO sightings in eastern Canada, "Swissair Down" a detailed look at the crash of Swissair Flight 111 off the coast of Nova Scotia and more recently Dark Object which chronicles the Shag Harbour Incident of October 4, 1967. Don has been investigating the UFO phenomenon for 20 years and presently concentrates on UFO sightings by pilots. He is the Canadian Affiliate and technical specialist for NARCAP, the National Aviation Reporting Center for Anomalous Phenomena. He has appeared in numerous documentaries, television and radio, lectured at various UFO conferences around North America and has contributed to various periodicals and magazines.