Monsieur Perdu is a fictional character from the novel "The Little Paris Bookshop" by Nina George. He is a bookseller who runs a floating bookstore on the Seine River in Paris, where he offers literary advice to his customers. Perdu has a unique ability to match people with the right books to heal their emotional wounds. Haunted by a lost love, Perdu has built emotional walls around himself. The story follows his journey as he decides to leave Paris and embark on a quest to find closure. Along the way, he discovers the power of friendship, love, and the importance of confronting the past.