The Everling and the Acid King (en Inglés) - J. Christie

14-year-old Chezzy might have just ruined his last chance at getting adopted. And after dozens of rejections, aging out of his children's home is about to become a reality. So, when he's half kidnapped by the madcap professor, Aris Kepler, he goes along with it. Brought far underground, he discovers a vast society bursting with mutants, the world's greatest scientists, and the results of centuries of technological advancement. Here, Chezzy learns that he is the last of the immortal everlings, who founded this tech paradise. But once enrolled at Kepler's school, Chezzy is quickly charged with finding an elusive figure hiding in the campus. As he juggles studies, making friends, and uncovering his own disturbing history, the everling learns how far he'll go to keep everyone safe from... the Acid King.