VIDEO : Sci-Fi Author Ursula K. Le Guin Dies

Award-winning and best-selling science fiction writer Ursula K. Le Guin has died at 88. Le Guin explored feminist themes in her writing and was best known for her Earthsea books. A statement was posted on Tuesday on Le Guin's verified Twitter account stating that she passed away peacefully on Monday. She gained fame in 1969 with "The Left Hand of Darkness," which involves a radical investigation of gender roles. The Earthsea books have been translated into 16 languages and have sold in the millions.