Which novel by D. H. Lawrence was a sequel to his earlier novel "The Rainbow"?

"Women in Love" (1920) is a novel by English author D. H. Lawrence. It is a sequel to his earlier novel "The Rainbow" (1915), and follows the continuing loves and lives of the Brangwen sisters, Gudrun and Ursula. Gudrun Brangwen, an artist, pursues a destructive relationship with Gerald Crich, an industrialist.

Lawrence contrasts this pair with the love that develops between Ursula Brangwen and Rupert Birkin, an alienated intellectual who articulates many opinions associated with the author. The emotional relationships thus established are given further depth and tension by an intense psychological and physical attraction between Gerald and Rupert.

David Herbert Lawrence (11 September 1885 – 2 March 1930) was an English writer and poet. His collected works represent, among other things, an extended reflection upon the dehumanising effects of modernity and industrialisation. Lawrence's writing explores issues such as sexuality, emotional health, vitality, spontaneity, and instinct. His novels include "Sons and Lovers", "The Rainbow", "Women in Love", and "Lady Chatterley's Lover".