This study sheds light on Matt Haig’s The Midnight Library, focusing on how memory and nostalgia critically shape protagonist Nora Seed’s search for meaning through alternate lives. It analyses Haig’s use of narrative techniques and symbolism to reveal the profound effects these themes have on Nora’s emotional development and self-discovery, highlighting their impact on her identity and fulfilment. This article explores the intricate relationship between memory and nostalgia, focusing on the protagonist, Nora Seed, a woman consumed by regrets and despair. She finds herself in an enchanting library, where she encounters another version of her life if she had made different choices. The article posits memory as sentimental longing for an idealised past, serving two purposes: driving Nora's journey and amplifying inherent imperfections on every pathway of life. The article explains how it affects Nora’s character by leading her towards self-acceptance and discovering a renewed love for life through detailed analysis. The study further showcases the literary significance of memory and nostalgia by providing a comparative analysis of Charles Dickens' A Christmas Carol. Ultimately, the article outlines Haig’s message about the importance of embracing one’s past while being open to future possibilities, presenting The Midnight Library as a profound exploration of human experience and emotional resilience.