The Polish - German Problem

From the front flap:
Poland's Western provinces are from south to north Polish Silesia, Poznania, and Pomorze; certain areas outside the three provinces have been incorporated, along with them, in the area Germany has seized. The three provinces are the very cradle of the Polish race and of the Polish State, the moat and rampart of the whole Slavonic world against the perpetual "Push to the East" of the German hordes, and the part of Poland with the most West-European character politically, socially, culturally and economically. Furthermore, as this study shows clearly, Poland's Western Provinces are the condition of her independence.