sentences:  His most important Esperanto works are "Abismoj" ("Abysses", 1923), "Saltego trans jarmiloj" ("A Leap across the Millennia", 1924) and "Mr. Tot Aĉetas Mil Okulojn" ("Mr. Tot Buys a Thousand Eyes", 1931), which have been translated into several languages.His books were inventive, rich in ideas, and a witty representative of enjoyable light literature with a talent for psychological observation and a precise knowledge of effects.After moving to Berlin in 1928, Fethke worked as a writer and assistant for Ufa.