"The First to Die at the End" is a young adult science fiction novel by Adam Silvera. The story is set in a future world where humans have discovered the secret to immortality, but at a steep cost. The main character, named Mateo Torrez, receives a call from Death-Cast, a service that alerts people that they have only 24 hours to live. Feeling alone and scared, Mateo connects with a stranger named Rufus Emeterio who also received the same call. Together, they decide to make the most of their last day by experiencing new things, meeting new people, and confronting their fears. As their time together grows shorter, Mateo and Rufus also grapple with the idea of leaving behind loved ones and the possibility of what comes after death. With poignant and heart-wrenching prose, "The First to Die at the End" explores themes of mortality, love, and the importance of living life to the fullest.