Two old science fiction books from the 1950s

Two old science fiction books from the 1950s; Hardcover with colored covers from the Space Age era; 1x “ON UNKNOWN STAR” by Anton Kolnberger - Düsseldorf, Hoch-Verlag 1954 - with great black and white illustrations; 1x "FLUG INS UNGEWISSE / A space trip" by Leslie Greener - Verlag Carl Ueberreuter 1955/56 - with 23 drawings by Kurt Wendlandt, with a dedication "for the best performance of the parents' association of the Wasagymnasium"; signed; traces according to age and use;