Hilma af Klint is now regarded as a pioneer of abstract art. Her work from the early 20th century predates the first purely abstract paintings by Kandinsky, Mondrian and Malevich. Now, for the first time, af Klints works, some 1,600 in all, have been collected in a Catalogue Raisonn. Af Klints work should be seen and appreciated in the series of paintings often depicting specific themes and this ground-breaking publication, divided into seven volumes, allows for this. Throughout her life af Klint used research-oriented methods trying to understand the spiritual contexts of the world. She investigated plants and other objects in their geometrical form. Nature was perfect; we humans just needed to look at it more closely. This concept is investigated in Volume V.