Newerly spent the years 1915-1923 in Russia, where he witnessed the October Revolution and was a convinced communist. Between 1918 and 1921 he worked in Allsowjetischen Communist Youth League. A law school in Kiev followed after his return to Poland in pedagogy studies at the Volna Wszechnica Polska in Warsaw. In 1925 he began working on progressive education projects and got into the circle of educators Janusz Korczak, whose secretary he was in 1926 and from which he took over in 1932 the editors of the magazine Przegląd Maly ( Little Review ).
After the beginning of World War II Newerly went into hiding, but was arrested by the Gestapo in 1943 and spent the time to end of war in various concentration camps. After 1945, he turned quite naturally in the service of the new communist leadership. He took care of young "progressive" writer and worked in the Związek Literatów Polskich ( Association of Polish literati ). Special merits he earned as a savior and later editor of the ghetto diaries Korczak.
As early as 1932 Newerly had begun a parallel career as a writer. In his novels, he combined educational and enlightening trends with a classic description of various backgrounds - quite in the spirit of romance, the political aspect of the " establishment of a better person ", ie: communists, was usually clearly visible. That's why he was able to become a leading representative of the Polish Socialist Realism after 1945. Precisely because of its descriptions of nature and the struggle of the people against their wrongs Newerly was also read by young people like. Some of his works have been (especially in the GDR ) also translated into German.
- Chłopiec z Salskich Stepów (1948 ) (English: The boy from the salt steppe, East Berlin 1952)
- Archipelago ludzi odzyskanych ( 1950) ( Eng.: archipelago of recovered people, East Berlin 1951)
- Pamiątka z Celulozy (1952 ) (English: A man's way of East Berlin 1953)
- Lene morze (1960 ) (English: The Sea of Trees In the Realm of the Tiger, East Berlin 1969, ISBN 3-353-00086-0. )
- Żywe wiązanie (1966 )
- Rozmowa w sadzie piątego sierpnia (1978 )
- Opiwardą Za, za siódmą rzeką ... (1985 )
- Wzgórze Błękitnego Snu (1986 ) (English: The hills of the blue dream, Berlin 1990, ISBN 3-353-00633-8 )
- Zostało z uczty bogów (1986 )