Instytut Wydawniczy Nasza Księgarnia

The oldest and largest publishing house of literature for children and youth in Poland. Founded in 1921, it published several thousand books for the young reader, in all age ranges. Publisher working under several names (depending on the period): State Publishing House "Nasza Księgarnia", State Publishing House of Children's Literature "Nasza Księgarnia", Publishing Institute "Nasza Księgarnia". https://pl.wikipedia.org/wiki/Wydawnictwo_%E2%80%9ENasza_Ksi%C4%99garnia%E2%80%9D