They Both Die at the End is a captivating and emotional young adult novel by Adam Silvera that explores themes of mortality, friendship, and living each day to the fullest. Here's a brief synopsis: On a seemingly ordinary day, two young men, Mateo Torrez and Rufus Emeterio, receive a startling call from a mysterious service called Death-Cast, informing them that they will die before the day's end. In this world, Death-Cast is an all-too-real service that predicts people's last day, allowing them to make the most of their remaining hours. Mateo, a shy and lonely teenager, has always played it safe, dreaming of adventures he'll never experience. Rufus, on the other hand, is a carefree thrill-seeker, but his past choices have left him with few friends to spend his last day with. The two boys, brought together by a mutual friend, decide to live their final hours to the fullest, embarking on a journey of self-discovery and connection. As the day unfolds, Mateo and Rufus form an unexpected bond, sharing their fears, dreams, and secrets. They create a bucket list of adventures and set out to make their last moments memorable. Along the way, they confront their pasts, find the courage to be true to themselves, and experience the power of love and friendship. As the hours tick by, the boys' newfound friendship becomes a lifeline, helping them navigate the challenges of facing death. They grapple with the question of how to make a lifetime's worth of memories in a single day. Through their shared experiences, they learn that sometimes the end can be just the beginning of something extraordinary. This poignant story highlights the importance of living authentically and cherishing every moment, reminding readers that life is precious and every day is an opportunity for love, growth, and adventure.