50 Watts has a lovely round up of Korean children's book covers from the 1960s (above: The Cable Car, 1964, cover design by Yi Eok-yeong). As a Korean American designer, these stood out to me not necessarily for their aesthetics or design sensibilities, but as strong works that are indicative of Korean art and culture from a post-war era.
(above: A Child From a Mountain Village, 1965, cover design by Baek Yeong-su)
(above: Stories of Great People, 1960)
(above: Blue Dreams Are High in the Sky, 1962, collection of stories)