This paper investigated how Nigerian novels influence the formation of national identity and support unity in Nigeria’s multicultural society. Literature has for centuries mirrored societal values and views, encouraged unity, and shaped the way a nation understands itself. This paper explores the ways in which Nigerian novels help shape national identity and strengthen values essential for enduring peace and growth in society. The study draws from selected novels by Chinua Achebe’s Things Fall Apart, Chimamanda Ngozi Adichie’s Half of A Yellow Sun, and Lola Shoneyin’s The Secret Lives of Baba Segi’s Wives. These novels are carefully examined to reveal consistent themes addressing issues of identity, unity, and how conflicts can be redressed. The research utilises postcolonial and nationalism theories to analyse how the characters, settings, and plots in the texts reflect Nigeria’s history and contemporary society. The findings show that Nigerian novels record both the challenges and victories of Nigeria’s people and can be used to promote coalition building across different communities. These novels emphasise cultural heritage, shared history, and shared aspirations, helping to build a sense of belonging and unify people from all backgrounds. These stories can help enhance a sense of national oneness and aid the country’s endeavours toward establishing and maintaining peace.