"First published in German ... in 1990 in conjunction with the exhibition "Paul Klee -Wachstum regt sich. Klees Zweisprache mit der Natur" at the Saarland Museum, Saarland.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Paul Klee : dialogue with nature. ISBN 3791311417. Published by Prestel in 1991. Publication and catalogue information, links to buy online and reader comments.
