The Twyborn Affair by Patrick White

Set against the backdrop of the early 20th century, this novel intricately explores the fluidity of identity through the life of a protagonist who navigates various personas across different continents. The narrative weaves through the complexities of gender, societal expectations, and personal freedom, as the central character adopts multiple identities, including that of a man, a woman, and an ambiguous figure, in a quest for self-discovery and acceptance. The story delves into themes of transformation and the human desire for connection, all while challenging the rigid norms of the time.