"The Museum of Extraordinary Things" is a fictional novel by Alice Hoffman that tells the story of a unique museum in early 20th-century New York City. The museum showcases unusual and bizarre exhibits, including human curiosities and strange artifacts, attracting visitors seeking the extraordinary. The narrative follows Coralie Sardie, a young woman who works at the museum and possesses the ability to swim like a mermaid. As she navigates her life amidst the museum's wonders, she becomes entwined in a mystery involving a missing person and the complexities of love and identity.