Discovery File 143/76 documents the mysterious fate of the 13 ft micro yacht at the center of artist Bas Jan Ader’s ill-fated attempt to cross the Atlantic Ocean. For the book, artists Marion van Wijk and Koos Dalstra compile years of research into the still unsolved mystery of Bas Jan Ader’s disappearance. The Spanish police report documenting the boat’s theft is reproduced in facsimile alongside a translation into English. The volume also compiles additional documentation produced during the editors’ investigations including transcriptions of interviews with Ader’s widow Mary Sue Anderson, curator Charles Esche, and family members of the owner of the Eduardo Pondal.