Lesbian voices and experiences have received little attention in Czech historiography: recent research has concentrated on the modern era from the 1950s. This article deepens our understanding of lesbian lives in interwar Prague. It focuses on two forgotten lesbian novels, Exiles of Love and The Third Sex, which were deliberately suppressed after 1948 by the Communist regime as examples of inferior bourgeois literature. The two authors, Lída Merlínová and Gill Sedláčková, both hailed from Prague’s cultural world (theatre and film) and were active too in the 1930s Czech movement for homosexual reform. Spanning the late twenties to the late thirties, the novels reveal tantalising glimpses of the evolving sub-culture of interwar Prague. Merlínová’s naïve novel of 1929, Exiles of Love, was the first Czech lesbian novel, and it betrayed the 1920s optimism of the ‘Czech New Woman’ who was prepared to challenge gender stereotypes. Sedláčková’s novel, The Third Sex, is a more explicit study from 1937, reflecting the more mature sub-culture but also a cynicism about the chances of homosexual reform. Yet it manages, even more than Exiles, to convey an uplifting and moral message. Indeed, both novels are about lesbian self-knowledge, exploring the scope for same-sex survival in a world where the best solution may be abroad, not in ‘provincial Prague’. In restoring these texts to lesbian literature we recover a range of voices, expressing the hopes and frustrations of some queer Czech women in an unusually liberal era.