"An Absolutely Remarkable Thing" is a science fiction novel by Hank Green that follows the story of April May, a young woman who discovers a mysterious sculpture in New York City. The sculptures, called "Carls," appear overnight in various locations around the world, sparking curiosity and chaos. As April gains fame for her viral video about the Carls, she navigates the complexities of social media, public perception, and personal relationships. The novel explores themes of identity, connection, and the impact of technology on society, ultimately questioning what it means to be truly remarkable.