After Anne of Green Gables (1908), Montgomery continued the story of Anne in a series of sequels, beginning with Anne of Avonlea (1909, about Anne as a schoolteacher) and Anne of the Island (1915, about Anne's university education). Next, she wrote: Anne's House of Dreams (1917, about her early marriage to Gilbert), Rainbow Valley (1919, about her children as pre-adolescents), and Rilla of Ingleside (1921, about her children as young adults during the Great War of 1914-1918 [World War I]). After a fifteen-year hiatus, Montgomery returned to the characters to fill gaps in the overall saga: Anne of Windy Poplars (1936), about Anne's three years as principal of Summerside High School before her marriage to Gilbert; Anne of Ingleside (1939), about Anne's children as youngsters; and The Blythes Are Quoted, completed close to the end of her life.