"Et si c'était vrai" (If Only It Were True) is a captivating novel by Marc Levy that blends romance and fantasy in a compelling narrative. The story revolves around Arthur, a young architect who discovers a mysterious woman, Lauren, who appears to be a ghost residing in his new apartment. As Arthur grapples with the reality of Lauren's existence, the two form a deep connection that transcends the boundaries of life and death. The novel explores themes of love, loss, and the complexities of human relationships, challenging the characters to confront their pasts and their desires. With a mix of humor, emotion, and suspense, Levy crafts a poignant tale that invites readers to ponder the possibilities of love beyond the physical realm, ultimately delivering a message about hope and the enduring power of connection.