"The First to Die at the End" by Adam Silvera is a prequel to his novel "They Both Die at the End." Set in a world where a company called Death-Cast can predict people's deaths, the story follows two new characters, Orion Pagan and Valentino Prince. On the day Death-Cast launches, both receive a call that they will die within the next 24 hours. As they meet and spend their final day together, they form a deep connection and navigate the complexities of life, love, and mortality. The novel delves into themes of fate, destiny, and the impact of knowing one's death date on how one chooses to live.