Szare Szeregi
Kamienie na szaniec (lit. "Stones for the Rampart", also translated as Stones on the Barricade) is a 1943 non-fiction novel by Polish writer Aleksander Kamiński. Published by the Polish underground press during the World War II occupation of Poland, the book describes the acts of sabotage and armed resistance carried out by the Polish underground scout movement, the Gray Ranks, of whom Kamiński was one of the instructors and leaders.