Mystérioso, a Montréal group is dedicated to playing Thelonious Sphere Monk exclusively. In January 1982, Sylvain Leroux, sax, and Pierre Cartier, bass, got together. The other members all joined separately: Jean Derome (flute), Michel Ratté (drums) and Guillaume Dostaler (piano). This group has succeeded in comunicating to their audience the fullness of the music written by Thelonious Monk. To be noted.' the name Mystérioso is the title of one of Monk's most beautiful compositions.