On February 5, 1908, Kate Skinner, a 21-year-old unmarried barmaid in Brighton, England, gave birth to twin girls. They each had ten fingers and ten toes, but were joined back to back at the base of the spine. Freaks, monsters–that’s what they were called. Mary Hilton, Kate’s employer and midwife, adopted Violet and Daisy and promptly began displaying the babies as “Brighton’s United Twins.” Exhibitions at street fairs, carnivals, and wax museums across England and Scotland followed. At 8 years old, the girls came to the United States, eventually becoming the stars of sideshow, vaudeville, and burlesque circuits in the 1920s and 1930s. In a story loaded with questions about identity and exploitation, Sarah Miller delivers a completely compelling, empathetic portrait of two sisters whose bonds were so sacred that nothing — not even death— would compel Violet and Daisy to break them.