1.) Fernand Khnopff
Fernand Khnopff, Frederik Leen
Hatje Cantz Verlag; 2004
Gebundene Ausgabe

2.) Magritte 1898-1967
René Magritte, Frederik Leen (Eds.), Royal Museums of Fine Arts of Belgium (author)
Harry N. Abrams; 1998
Hardcover

3.) Michael Asher
Frederik Leen, Birgit Pelzer
Art Books International; 1996
Paperback