Paul Klee (1879-1940) is perhaps one of the most significant and best-loved artists of the 20th century. For the nine volumes of this publication, the Berne-based Paul Klee Foundation has researched the artist's 9600 drawings, prints, watercolours, and oil paintings - allowing the artist's complete work to be assembled and published in one complete set. Presenting Klee's oeuvre in chronological order, each volume contains an introduction in German and English, an explanation of the catalogue system, a German-English glossary, a bibliography and indexes. All the entries are illustrated, and include catalogue numbers, technical descriptions, measurements, references to related works, details of provenance and location, relevant literature and a list of exhibitions and auctions in which it has appeared. Klee's own entries from the oeuvre catalogue he wrote from 1911 onwards are also included, and some of the most important works of his career are illustrated in colour.