Career
Piil was a film critic at Berlingske Tidende 1962-1967, and has since then been at Dagbladet Information where he has also written about literature and rock music He was a film consultant at the Danish Film Institute 1975-1977, and 1968-1996 consultant for DR"s film department. Piil has written several reference works on Danish cinema.
His three books published on Gyldendal, Danske filmskuespillere ("Danish film actors") (2001), a monograph on 525 actors active in the period 1930-2001, Danske filminstruktører ("Danish filmmakers") (2005), detailing 120 Danish film directors active between 1930 and 2005, and Gyldendals danske filmguide ("Gyldendals Danish film guide") (2008), a description of 1200 Danish feature films — virtually every major film release from 1930 to 2008, poses with a total volume of approximately 1,800 pages the most comprehensive survey of Danish film and the main figures behind lieutenant
In 2003, Information published Film på hjernen: 40 års bedste biografoplevelser a 664-page selection of his film criticism from the last 40 years. Piil has translated three works of Vladimir Nabokov to Danish.