The Lady of the Lake is the fifth and final novel in the Witcher Saga written by Polish fantasy writer Andrzej Sapkowski, first published in Poland in 1999. It is a sequel to the fourth Witcher novel, The Tower of Swallows.

The Witcher is a series of six fantasy novels and 15 short stories written by Polish author Andrzej Sapkowski. The series revolves around the eponymous "witcher", Geralt of Rivia. "Witchers" are monster hunters given superhuman abilities for the purpose of killing dangerous creatures. The Witcher began with a titular 1986 short story that Sapkowski entered into a competition held by Fantastyka magazine, marking his debut as an author. Due to reader demand, Sapkowski wrote 14 more stories before starting a series of novels in 1994. Known as The Witcher Saga, he wrote one book a year until the fifth and final installment in 1999. A standalone prequel novel, Season of Storms, was published in 2013.