He first introduced this new style in two works: Für Alina (1976) and Spiegel im Spiegel (1978).
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This is inferred in the scenes depicting the surreal dream-paintings from Yor's Minroud in Die Unendliche Geschichte (The Neverending Story), and is made explicit in Michael Ende's book Der Spiegel im Spiegel (The mirror in the mirror), a collection of short stories based on (and printed alongside) Edgar Ende's surrealist works.