Holding Up The Universe by Larry Niven

In this compelling young adult novel, two seemingly different teenagers, Libby and Jack, find their lives intertwining in unexpected ways. Libby, once dubbed "America's Fattest Teen," is returning to high school after years of isolation, determined to redefine herself beyond her weight. Jack, on the other hand, struggles with face blindness, a condition that prevents him from recognizing even his closest family members. As they navigate the complexities of high school life, they discover that their struggles, though different, connect them in profound ways, leading to a journey of self-discovery, acceptance, and the realization that everyone is more than the labels society assigns them.