The Scorpio Races is a young adult novel by Maggie Stiefvater set on the fictional island of Thisby. The story revolves around an annual race featuring dangerous water horses called capaill uisce, which emerge from the sea. The narrative follows two main characters, Sean Kendrick and Puck Connolly, as they prepare for the perilous competition. The race is not just a test of speed but also a battle for survival, as the capaill uisce are known for their ferocity. Both Sean and Puck face personal challenges and must confront their fears while navigating the intense rivalry and the island's traditions surrounding the race.