The Lonely Girl, later retitled Girl with Green Eyes, is the second novel in the acclaimed trilogy by Irish author Edna O Brien. First published in 1962, it continues the story begun in The Country Girls, further developing the themes of female experience and the complexities of romantic and social relationships in mid-20th-century Ireland.

The novel follows the protagonist, Kate Brady, now living in Dublin, as she navigates the challenges of young adulthood. The narrative delves deeper into Kate's inner life, particularly focusing on her romantic entanglements and her evolving friendship with Baba Brennan, her more worldly and rebellious friend from the first novel. The character of Kate embodies the struggles of a young woman striving for independence and self-fulfillment in a society still bound by traditional norms and expectations.

The Lonely Girl is characterized by O Brien's signature lyrical prose and acute psychological insight. Through Kate's experiences, the novel explores themes of love, desire, and the tension between societal expectations and personal identity. O Brien's depiction of Kate's emotional journey is both poignant and empathetic, offering a nuanced portrayal of the complexities of young love and self-discovery.

This novel, like its predecessor, faced controversy upon its release due to its candid portrayal of female sexuality and critique of Irish social norms. Nonetheless, The Lonely Girl was instrumental in cementing Edna O Brien's reputation as a fearless and important voice in literature. The novel's honest and compassionate exploration of the female experience continues to resonate with readers, making it a significant work in the canon of Irish literature and feminist fiction.