Nazi Germany's civilian occupation regime over Lithuania, Latvia, Estonia and western Byelorussia (1941-1945), seat Riga, under Reichskommissar Hinrich Lohse — four Generalbezirke (Estland, Lettland, Litauen, Weissruthenien) run under Generalplan Ost.
Overrun by the Red Army's 1944 Baltic Offensive; its remnant, the Courland pocket, held out until the German surrender of 8 May 1945.
Standard history (with Rein Taagepera) of the Baltic states under both Soviet and Nazi rule, covering the Ostland years directly. (Open Library verified: Misiunas, 1983/1992 eds.)
Broad verified WWII occupation history with chapters on the eastern Reichskommissariats. (Open Library verified: Mazower, 2008)