Lesbian literature is a subgenre of literature addressing lesbian themes. It includes poetry, plays, fiction addressing lesbian characters, and non-fiction about lesbian-interest topics.
Fiction that fall into this category may be of any genres, such as historical fiction, science fiction, fantasy, horror and romance.
Lesbian literature includes works by lesbian authors, as well as lesbian-themed works by heterosexual authors. Even works by lesbian writers that do not deal with lesbian themes are still often considered lesbian literature. Works by heterosexual writers which treat lesbian themes only in passing, on the other hand, are not often regarded as lesbian literature.
The fundamental work of lesbian literature is the poetry of Sappho of Lesbos. From various ancient writings, historians have gathered that a group of young women were left in Sappho's charge for their instruction or cultural edification. Not much of Sappho's poetry remains, but that which does demonstrates the topics she wrote about: women's daily lives, their relationships and rituals. She focused on the beauty of women and proclaimed her love for girls.
Certain works have established historical or artistic importance, and the world of lesbian fiction continues to grow and change as time goes on. Until recently, contemporary lesbian literature has been centered around several small, exclusively lesbian presses, as well as online fandoms. However, since the new millennium began, many lesbian presses have branched out to include the works of trans men and women, gay and bisexual voices, and other queer works not represented by the mainstream press. Additionally, novels with lesbian themes and characters have become more accepted in mainstream publishing.
In the early nineteenth century, Chinese poet Wu Tsao gained popularity for her lesbian love poems. Her songs, according to poet Kenneth Rexroth, were "sung all over China".
Though lesbian literature had not yet evolved as a distinct genre in English in the 19th century, queer female writers like the essayist and supernatural fiction writer Vernon Lee sometimes hinted at lesbian subtexts in their work or, like Lee's lover Amy Levy, wrote love poems to women using the voice of a heterosexual man. Others wrote, but kept their writing secret. Beginning in 1806, English landowner and mountaineer Ann Lister kept extensive diaries for thirty four years which included details of her lesbian relationships and seductions, with the lesbian sections written in secret code. The diaries were not published until the 1980s. . In 2010, they were the basis for a BBC television production, The Secret Diaries of Miss Anne Lister.