The SPD for some reason has not really commanded much attention in the historiography. The party itself has a somewhat complicated history with splinterings and reformations that belie the contemporary SPD's claim to be one of Germany's oldest political parties. One of the classic English-language books on the SPD is German Social Democracy, 1905-1917: The Development of the Great Schism by Carl E. Schorske. Although Schorske does not go into the events of the November Revolution much, he does outline the background for the SPD's resurgence in 1918 as well as the USPD's opposition to the mainstream socialist party. German Socialism and Weimar Democracy by Richard Breitman is a somewhat conventional account of the SPD's political leadership and its failures in the Weimar period. German Social Democracy and the Rise of Nazism by Donna Harsch is a more recent work that upends some of the historiographic conventions upheld by Breitman and Schorske. Finally, the anthology Between Reform and Revolution: German Socialism and Communism from 1840 to 1990 is a decent introduction to the SPD and its long history.