After the work of Asger Jorn has long been accessible through catalogs of works of art and printmaking, the "catalog raisonné of the sketchbooks" opens up a hitherto unknown area. Beginning in 1936 in Paris - Asger Oluf Jørgensen was just twenty-two years old - the inconspicuous companions of his artistic everyday life accompanied him through all the ups and downs of life. The last sketchbook was filled in 1972. This now accessible basic material can be included in the ongoing research process with the aim of securing existing knowledge and developing new knowledge. According to the current state of affairs - this is always to be emphasized in catalogs of works - one can assume 51 of Jorn's sketchbooks with 716 sketches. All are shown.